Professional killer Kate works with curator Varrick, who raised her since childhood. In Osaka, the girl agrees to eliminate the mysterious target, but soon realizes that the customer wants her to kill the teenage girl Ani. Unwilling to complete the task, Kate goes to Tokyo and prepares for another task that will help restore her reputation. Before an important event, Kate meets a handsome stranger in a bar, but the next day she faints during a task. Waking up in the hospital, the killer finds out that she was poisoned, and she has 24 hours left to live. Kate goes to find out who decided to get rid of her and why.