The series follows smart, capable and by the book Grace Narayan (Anjli Mohindra), who was flying high as an inner-city police sergeant before being forced into a 'punishment posting' on the small, antiquated island of St. Jory. Confronted by the forgotten and unsolved case of missing teenage boy Cai, Grace quickly discovers that she must overcome scarce evidence, extraordinary local characters, and the island's strange cult history to uncover the truth.