Some people see only what they want to see. And some people hide in plain sight.
In the quiet streets and lanes around Nottinghamshire, everyone knows Danny. He walks with a strange, loping gait. He speaks in slow, stumbling bursts, stammering, sometimes hitting at his own arms as if fighting words that won't come. He carries a rolled rug over his shoulder and murmurs to himself as he goes. To the villagers, to the police, to anyone who passes - he is harmless. Simple. Someone to smile at, nod past, and forget.
But people are starting to die.
Brutal, violent deaths. Witnesses speak of a figure - a clown, an ape, a tall gaunt thing stripped bare - seen in the shadows before the violence strikes. Yet every time the police look closer, all they find is Danny. Standing nearby. Watching. Saying little. Seeming lost.
Detective Inspector Riley begins to piece it together. But the deeper he digs, the stranger the truth becomes. Because Danny isn't what he seems. And the man they call simple may be the most dangerous person of all.
A gripping psychological thriller in the tradition of The Usual Suspects, A Simple Mind builds slowly to a shattering reveal - where nothing is as it appeared, and the killer has been standing right in front of them all along.