The Sea Detective

Cal McGill is an Edinburgh-based oceanographer, environmentalist and one-of-a-kind investigator.

Using his knowledge of the waves - ocean currents, prevailing winds, shipping records - McGill can track where objects came from, or where they've gone. It's a skill that can help solve mysteries ranging from disappearances to murder.

Two severed feet wash up on two different islands off the coast of Scotland. Forensics shows that the feet belong to the same body. As Cal McGill investigates, he unravels a web of corruption, exploitation and human trafficking, which threatens many lives across the globe - including his own...