Having washed up on the Orkney island of Hoy, Megan spends most of the film's present tense in bed recovering when she's not telling DCI MacKelly (Tam Dean Burn) what happened after she, her best friend Lexi (a sparky Sophie Skelton), captain Daniel (Akshay Khanna) and mystery man Mike (Nick Skaugen), a last-minute replacement for Lexi's boyfriend Adam (Mark Strepan), set off on their voyage.