When Sam returns home to the tidal island where he grew up to attend a funeral, he soon discovers that the seedy underbelly of this small community harbours more than just a few secrets.
Paula, her son Carl, and his estranged partner Emily, join family members to mark the birthday of their missing son. As Carl fights to convince Emily to come home, new information comes to light about the missing boy, the implications of which are worse than anyone could have imagined.