On Shetland, the launch of an exhibition at The Herring House art gallery is disturbed – a stranger bursts into tears, claiming not to remember who he is or where he comes from. The next day, Inspector Jimmy Perez finds his dead body in a fisherman’s hut.

Initially, it seems to be a straightforward case of suicide – yet this is no desperate act. Instead, it soon becomes clear, this is the work of a cold-blooded 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 . . .