The opening episode of a six-part thriller set in rural Ireland. Cat arrives at her childhood home where her mother has just died and immediately starts asking awkward questions.
Cat struggles to get her suspicions taken seriously after her mother's mysterious death. She tracks down an old friend from her past who may be able to shed light on the present.
Jim finally tells Cat the truth. The episode flashes back to the days before Mary's death, and the chain of events that led to her fall are revealed along with Jim's truth.