Alice's baby is two weeks old when she leaves the house without her for the first time. On her eager return, she finds the front door open, her husband asleep on their bed upstairs. She rushes into their baby's room and screams. 'This isn't our baby! Where's our baby?' Her increasingly hostile husband swears she must be either mad or lying, and the DNA test is going to take a week. One week later, before the test has been taken, Alice and the baby have disappeared. Run away, abducted, murdered? The police who dismissed her baby swap story must find out, and as they do, they find dark incidents in David's past - like the murder of his ex-wife...