Carrie Wells is a police detective with a flawless memory. The murder of one of Carrie's neighbours leads her back to her old profession, where she will use her perfect memory skills to catch the killer.

To solve the brutal murders of an anaesthesiologist and her husband, Carrie calls on her own childhood trauma to help her connect with the witness.

When a hotel maid is accused of murdering a guest who she says tried to rape her, Carrie takes matters into her own hands to uncover the truth, threatening Al's investigation.

After an explosion destroys a murder victim's apartment, Carrie's memory of the crime scene leads her and Al to an upstate prison to question an inmate who founded a charity to rehabilitate ex-gang members.

Carrie uncovers a deadly web of police corruption when she attempts to clear the name of Al's former NYPD mentor, who is gunned down in an ambush.

While investigating an heiress' mysterious death, the truth about the victims past exposes a PR agent's ruthless ambition and prompts Carrie to recall her own attempt to create a new identity. Meanwhile, a visit to her mother produces a surprising lead about the identity of her sister's killer.