On her way to visit her grandfather at a retirement home, a mother disappears while buying flowers from a roadside van.

Matt learns that his missing wife is pregnant; Hazel suspects her son may have been involved in the abduction.

Leanne's disappearance turns into a murder investigation; Matt becomes the subject of police scrutiny; Matt and Farnes make a disquieting discovery.

Matt argues with Leanne's parents after a TV interview; Matt and Sarah make a grisly discovery.

The discovery of a burnt-out van reignites the investigation; police stake out Hazel's home; Amy attends her retirement party.