Two ghosts whose haunting of their former boss takes an unexpected turn, find themselves on a collision course which spirals from a family crisis into a horrifying atmosphere of supernatural chaos.

SYNOPSIS:

A female programmer Hana Yackley is tasked with developing a revolutionary satellite navigation system: Infinity Sense that uses QR code technology in-sync with human emotions, decision making and error, capable of guiding drivers and predicting accidents. Unfortunately she is diagnosed with a terminal disease and dies. At her burial, a sign indicates her mission on Earth is not over. At the same time, a vengeful demon ghost Isabelle Hughes, manifests itself brutally when an unruly couple insults her gravestone. After her funeral, Aisun, a helpware Hana created completes the software, turning the financial fortunes of her struggling employer Kyungsoft. However, her former boss Yang enriches himself with fat bonuses, which are extended to the company board chairman Yun and his secretary Eun-sook. Hwa uses a supernatural video to ask Yang to pay royalties and benefits due to her for the software as it would help her sick mother Seung get treatment. Yang dismisses the video as a blackmail from Hwa’s family for extorting money from the company, however, decides to send them a little check which is insufficient for her treatment. Seung uses the money to pay off outstanding rent to prevent being evicted by their landlord. Joon, Hwa’s younger brother expresses his desire to be an exorcist, hopeful of stopping their family bad luck but Seung discourages him due to inability of the family to sponsor his training. Later, Seung confronts Yang about Hwa’s royalties when he is celebrating with Yun, prompting him to stop payments of all benefits. This attracts the wrath of In-hye, who was a controversial deceased staff member on the gratuities and royalty payroll of Kyungsoft. She kills Yun using Yang’s teeth as her weapon. When Yang is hospitalized, Joon attempts to confront him in the hospital but is mysteriously kept in a rerouting loop which always terminates in the institute for training of exorcists. There the director encourages him to pray and apply for a scholarship from volunteer donors. In-hye attacks Yang again in the hospital but is unable to kill him as Joon attacks her with a fire extinguisher causing her to flee. Hwa is forced to intervene as In-hye tries to burn down the hospital with a flaming QR code. When Yang flees the hospital for home treatment, Yang follows him explaining the health challenge of his mum and how Hwa’s death exacerbated it. Yang instructs his secretary to transfer all the money to Seung causing all hell to break loose. In-hye burns down Yang's mansion, then proceeds to abduct him and Seung, threatening to drag their souls to hell. She corrupts the code of Infinity Sense for many drivers resulting in widespread accidents. Hwa and Joon fight In-hye at the cemetery during which Hwa unlocks the pure flame from her good works enabling her to overpower In-hye. As In-hye is about to hurl Seung and Yang into a version of hell's gate she mounts, Seung's prayers removes the codes of wicked deeds all over Hwa restoring her to a glorified human state, enabling her to cast In-hye into hell. However, all their efforts are about to be wasted when Yang's wife appears and hurls him into hell, reopening the gates for In-hye and many more demon-ghosts. However, in the nick of time, the exorcists arrive and together they vanquish all ghosts to hell, destroying the gate also. Hwa is freed and leaves through a narrow golden door, promising Seung and Joon they will see each other again.

GHOST CODE