When Elaine O'Hara goes missing in the Dublin Mountains in 2012, police assume she has taken her own life. But over a year later, a chance discovery of items found in a lake by a group of fishermen, lead to a body of a young women, sparking an incredible murder investigation, and leading to a very surprising suspect.
Graham Dwyer, a successful architect and a happily married father of two, has been leading a double life of twisted kinks and violent fetishes and now the police suspect him of murder.