Carly (Poppy Montgomery) has a memory beyond that of an ordinary person. Her brain is like a scanner, recording everything she sees and hears. However, Carly, who has such a powerful ability, has forgotten the details of her sister's murder, and this case has become an unsolved case. Carly, who has gradually come out of grief, has returned to the homicide team of the police force and formed a partner with her ex-boyfriend Al (Dylan Walsh) in order to solve the case of her sister's murder one day. Other members of the homicide team with Carly include Mike (Michael Gaston), Roy (Kevin Rankin) and Nina (Daya Vaidya). In a bloody and complicated murder case, can Carly use her ability to find out the real murderer one by one? And how will the unfinished fate between her and Al continue?