Bitten Contract summary: Who needs medicine when a vampire's bite can instantly make you feel better? Chae-i visibly suffers from a chronic headache, which has earned her a terrible reputation as an actress. When she happens to get a taste of relief after getting bitten by the top star, Ijun -- who turns out to be a vampire -- she asks him to continue biting her, but Ijun offers a contractual relationship instead. What is his motive? Will Chae-i find relief?