Cadi and Owen race to prevent Sion from doing something desperate. With the case solved, Cadi realizes she can't leave Wales behind without taking one last chance.

News arrives at the police station that a body has been found, and Cadi and Vaughan reach a realization about the case.

Cadi throws herself into her work, and Siôn receives bad news in his work and demands answers from Father McEwan.

Cadi and Vaughan interview Piotr, a Polish man working in the old hospital, but he has little knowledge. The sisters say goodbye to the house on the island.

Father McEwan comes to see Glyn to ask how he is coping with what happened - to Siôn's shock. Cadi has to face facts that she hurt someone important to her.

A man's body is found in a river and Cadi and Vaughan are called to investigate.