Coral, her lover, and a number of friends visit a regular haunt known as Serenity Island. Collectively, they've done this for the past few years in order to celebrate Coral's birthday, but this trip will be different, and causes Coral to rename their favourite spot! Once they've settled in to enjoy their week's secluded holiday and celebrate Coral's thirtieth birthday, everything starts to go wrong. After many terrifying and tragic events, Coral begins to wonder if they'll ever get off the island in one piece, or indeed, at all…
