Y/n is an FBI agent who is fighting with all of her might to keep her grasp on her sanity after losing her husband. When she finally starts moving on, she gets dragged back in when her late husband somehow gets connected to the current case she is working on. She works the case with Han Jisung, but it soon gets difficult with her growing feelings for him. Will she ever solve the case, or will the dark secrets her husband kept overcome her? Read to find out.....