Commissioner Jao Baptista investigates on Corvo, a tiny island in the Azores in the Atlantic. Amid the dense web of relationships and the turmoil of his fragile emotional state, which often takes a toll on his health, the solitary Baptista attempts to solve a case that initially overwhelms him. No one seems to like him or his presence on Corvo, and in fact, no one takes him seriously. But that is precisely Baptista's most dangerous weapon.