The summer is the hottest yet in the Brittany coastal town of Morranez, but when a new case lands on the desk of the Toussaints detective agency, there can be no time to relax. As wild fires bear down on the town, the alert goes out for a missing girl.

Nineteen-year-old Briony Moorcroft has seemingly been taken from her sleepy Welsh village and brought to France. Her parents are baffled and scared - Briony needs her life-saving medicine or this case will become even more sinister, and with the police dragging their heels, the Moorcrofts are relying on Mila Shephard and Carter Jackson's sleuthing skills.

Meanwhile there are mysteries troubling Mila's life too. Two years after the accident that swept her sister Sophie and brother-in-law Charlie away and left their daughter Ani in Mila's care, new evidence resurfaces that makes Mila doubt everything.

Can Carter and Mila find Briony before it's too late? And is the truth about Sophie and Charlie finally about to be revealed...