Hi, Brittany Mack. What's the mark? A special mark on her body? A person who's the target of a con?

Names in loglines are usually for biopics, well-known stories, and franchises (like Mission: Impossible).

And I'm confused about "Ellie must discover whether everything she knows about her mark is true or if the city of Lanovia on Kurokami is full of secrets and lies." Maybe it'll make more sense once I know what the mark is.

The logline seems a bit of a hodgepodge. There's an unforgettable night, an unexpected enemy, a mark, and a city of lies and secrets. Narrowing it down and eliminating the city's name and location might help make the logline clearer.