Harriet Webb

Aboard the mega cruise ship Sacramentum, 20-year-old new recruit, Jamie, infiltrates the 3000-strong crew in a desperate race to find his missing sister. She was working aboard the same vessel on a previous tour and vanished mid-charter.

A veteran beat cop and teenage girl fall to their deaths from a tower block in south-east London, leaving a five-year-old boy and rookie police officer Lizzie Griffiths on the roof, only for them to go missing.

Aboard the mega cruise ship Sacramentum, 20-year-old new recruit, Jamie, infiltrates the 3000-strong crew in a desperate race to find his missing sister. She was working aboard the same vessel on a previous tour and vanished mid-charter.