Girl One: Murder

FBI Special Agent Maya Gray, 39, has seen it all. She's one of BAU's rising stars and the go-to agent for hard-to-crack serial cases. When she receives a handwritten postcard promising to release 12 kidnapped women if she will solve 12 cold cases, she assumes it's a hoax.

Until the note mentions that, among the captives, is her missing sister.

Maya, shaken, is forced to take it seriously. The cases she's up against are some of the most difficult the FBI has ever seen. But the terms of his game are simple: If Maya solves a case, he will release one of the girls.

And if she fails, he will end a life.

Maya embarks with an urgency unlike any she's ever felt. In a race against time, and with her sister's life hanging in the balance, she must unravel the link between the 12 captives and end the killer's dark game once and for all. Is this killer toying with her? Does he truly have her sister? Will he ever give her back?

Or will Maya end up sucked too deep into this killer's twisted cat-and-mouse game to notice that she, herself, is the prey?