When the sun never sets it brings to light deadly secrets.
On Shetland the launch of an exhibition at The Herring House art gallery is disturbed by a stranger who bursts into tears, then claims not to remember who he is or where he comes from. The next day Detective Jimmy Perez finds his body in a fisherman's hut. Initially it seems to be a straightforward case of suicide, yet this is no desperate act and is instead the work of a cold and calculating killer.
As Perez investigates, he finds himself mired in the hidden secrets of a small community. Then another body is found. Perez knows he must find the killer before another death occurs.
But it is midsummer, an unsettling time when the sun never really sets in Shetland and nothing is quite as it seems . . .