A university professor, confident that everything which occurs in life has a rational explanation, finds his beliefs severely challenged when, during a vacation to a remote coastal village in Norfolk, he blows through an ancient whistle discovered on a beach, awakening horrors beyond human understanding.
A British secret agent in Germany takes a job as the assistant to an elderly lighthouse keeper, planning to make his escape with some valuable documents when a British boat arrives to pick them up.
Based on a famous stage play and set in the year 1912, an upper crust English family dinner is interrupted by a police inspector who brings news that a girl known to everyone present has died in suspicious circumstances. It seems that any or all of them could have had a hand in her death. But who is the mysterious Inspector and what can he want of them
