Bonnie arrives on a remote sea fort off the coast of England to take part in a mysterious reality TV show. Competing against seven strangers, she must solve a series of puzzles to win the prize money. No one leaves.

It doesn't take long for the contestants to turn on one another. Who will sacrifice the most for wealth and fame? And why can't Bonnie shake the creeping sense that they are not alone?The only way out is to win. When the first person is found dead, the others begin to panic.

Because there's a killer with them inside the fort, and anyone could be next. If Bonnie wants to escape, she needs to win...