Quentin and his friends go undercover and head to the Loch of Arthur where they find hidden passages beneath the Loch, solve the Moon Code and complete their mission when they locate the secret ION base.

SYNOPSIS:

FADE IN

Captain Unwin Macpherson reports to General Winters, confirming Quentin had been placed within Edgewater, the identity of the Undercover Agent who had broken into the records room, the discovery of a rogue terrorists cell called ION and one of the teachers as a double agent. The General reads the decoded message from Quentin's parents.

I.O.N IS REAL. WE NEED TO DEAL. THEY SEEK TO CAUSE UNREST BETWEEN EAST AND WEST. GO WHERE THE LOCH OF ARTHUR FLOWS. BEWARE BELARUS AGENTS ARE MOLES.

Quentin and his friends arrive at an army base on route to the Loch of Arthur. Left in the hands of The Corporal, they receive some basic fitness and orienteering training. During a night excursion, Quentin, his friends and the Corporal stumbling across a meeting between Mr Cole and three army soldiers. The Corporal guides his young charges back to their billet before rousing the camp, arresting the three soldiers and sweeping the woods for Mr Cole, only he has slipped away.

Continuing their journey, Quentin arrives at the Loch of Arthur and his first ever summer holiday begins in earnest, with fun down by the loch with their new friends, Ryan and Ella, son and daughter of the Lodge owner Mrs Willow. Swimming and boating in the hot summers sun, Quentin is having a grand old time, and tales of King Arthur and his knights capture his imagination. Whilst canoeing, they discover a castle within the rock face and hear of secrets tunnels beneath the loch and that very evening Ryan shows them where the tunnels start, only to reveal a locked door to which he doesn't have a key.

But, Quentin and his friends have Bluey, who soon picks the lock and their adventure truly begins.

Heading into the tunnels, they come to a small cavern, Bluey finding an old cutlass and Ella a gold coin. Getting late, they head for bed, only to return the next day to continue their search.

Further into the tunnels, they discover a second, large cavern, where Quentin finds an old diary and another gold coin. The kids have fun playing with the echos within the old tunnels.

Spending the following day down by the loch, Quentin learns the diary belongs to Ryan's great-great grandfather who was researching the myth of Arthur. Within the book he discovers the Moon Code.

Evening falls and once again Quentin and his friends explore the tunnels,this time making it all the way to the castle, exploring several rooms before calling it a night. Heading back through the tunnels they are intercepted by four armed men. They had found ION.

Taken to an abandoned submarine pen, Quentin and his friends are locked in a storage room and left to their own devices. Big Mistake. Having to wait 24hours is tedious and Quentin spends the time reading aloud from the diary, sharing the Moon Code until just past midnight. Making short work of the bolts and lock, Quentin leads his friends across the base and back into the tunnels where they meet Unwin and his rescue team. Relieved, Unwin sends Quentin and his friends back to the Lodge whilst he goes on with his team to secure the Submarine Base. Home safe, they are scolded for putting themselves into such peril and sent to bed. After a lay-in and hearty breakfast the children receive their punishments. Later, Unwin briefs them on the ION Base and empties a pile of shredded paper onto the dining table. Their challenge; to put together as much as possible in order to learn more about the terrorist group; ION. Managing to piece together Dragon Investments, Victor Van Hagen, dates the 7th and 15th September and another name Aurora. Checking Google they discover a Dragon Investments in Berlin.

Berlin: After a turbulent flight, Unwin prepares the team to infiltrate Victor Van Hagen's office, first with reconnaissance, and then, having formulated a plan, execution. Dressed as girls, Quentin and Clive join Bluey, Vicky and Mel as they rush the receptionist of Dragon Investments pleading for the loo. Once there, Mel, Vicky and Quentin leave, making a lot of fuss and noise, leaving behind Clive, their technical whiz and Bluey, their lock pick. Once inside the office they discover they are not the first to try and plant bugs, discovering several and leaving no obvious place for their own. Taking a chance, Clive attaches a small bug to a modern art piece.

Back at the Hotel, entering their room they encounter Tessa Elisabeth of the CIA together with two students from the USA School of spies, twins Cathy and Gary. Gaining their friendship, Gary lets slip they are heading to China where they believe ION's headquarters may lie. Tessa Elisabeth confirms the same to Unwin but dashes Quentin's hopes when he says they will not be going to China. About to leave for dinner, the laptop speaks!

The bug is working. Mr Cole and Victor Von Hagen are discussing ION matters. Listening carefully they learn of a massive shipment of money and arms, schedule to leave on the 7th September, its destination, London,England, arriving on 15th September on the ship Aurora.

Quentin and his friends travel back to London, Unwin having made plans with UK armed and police forces for the take down of the ION terrorists in London. They have a castle to explore.

Once again, Quentin leads them through the tunnels to the castle, where he shares his theory about the Moon Code. Everyone is on board, so he sends them to the corresponding rooms within the castle, mist slowly thickening above him as each one enters. Clive, the last enters and the mists descends.

Quentin discovers himself and his friends within a cavern under the Loch. Footsteps approach and an old man appears. Merlin himself. Greeting first Unwin as a mighty warrior and then Quentin as a Prince of the realm, Merlin is confused and aghast that a mere commoner had managed to break his code. That was not right, not right at all. Merlin, in haste to check his spell book, leads Quentin and his friends to his home. A huge cavern with several more leading off.

Here, Quentin discovers the Thirteen Treasures of Briton and the resting place of King Arthur, Guinevere,and his knights.

Merlin gathers Quentin and the others to him.

MERLIN

Right, my knights of the new age. Through the old magic you have been brought to us and in accord with ancient agreements that have echoed down the centuries, if the realm is in need of us, you only have to call and we will come.

The wait of responsibility settles upon Quentin.

His task complete, Merlin leads Quentin and the others back through the mists to the castle and bids them farewell.

Returning to the Lodge, Quentin's friends lament over the lack of success exploring the castle, only he and Unwin having any memory of what had just happened. Since Unwin was happy to remain quiet, Quentin follows his lead.

Mission complete, summer holidays over, Quentin returns to Edgewater to start his second year.

FADE OUT