Follows DI Jimmy Perez and his team as they investigate a single mystery--the disappearance of a young man on the overnight ferry to Shetland--that evolves into an increasingly complex case, leading the investigation from the Shetland Islands to the streets of Glasgow.

Follows DI Jimmy Perez and his DS, "Tosh" MacIntosh, as they investigate how the cold case of a teenager's murder is linked to their current investigation of a journalist's murder.