The crime fighting team of clinical psychologist Tony Hill and police detective Carol Jordan investigate a serial killer who is targeting women who look suspiciously like Carol. Guilt and grief have driven a wedge between partners psychologist Tony Hill and ex-DCI Carol Jordan. But just because they're not talking doesn't mean the killing stops. Someone is killing women who bear an unsettling resemblance to Jordan. And when the evidence begins to point in a disturbing direction, thinking the unthinkable seems the only possible answer. Cornered by events, Tony and Carol are forced to fight for themselves-- and each other-- as never before.