He hides in the shadows, waiting for the perfect moment. Each kill is calculated, planned and executed like clockwork.

Struggling to balance her personal and professional life, young DS Becca Vincent has landed the biggest case of her career -- and she knows that it will make or break her. But how can she identify one face in a sea of thousands? With the help of Police Super Recogniser Joe Russell, she strives to catch a glimpse of the elusive murderer, but he's watching her every move.

Time is not on their side. The body count is rising, and the attacks are striking closer and closer to home. Can Becca and Joe uncover the connection between the murders before the killer strikes the last name from his list?

From the bestselling author of When You Disappeared and The Good Samaritan comes his most thrilling novel yet.