When maverick police sergeant Jolly Macken is banished to the sleepy 1950s Irish border village of Blackwatertown, he vows to find the killer of his brother – even if the murderer is inside the police. But a lot can happen in a week. Over seven days Macken falls in love, uncovers dark family secrets, accidentally starts a war and is hailed a hero and branded a traitor.

When Blackwatertown explodes into violence, who can he trust?

And is betrayal the only way to survive?