14-year-old Jack Whittaker has it made. Heir to a billion-dollar salvage company, Gulps Salvage, he’s all too used to private jets and celebrity friends. He just wishes he didn’t find it all so boring. Stuck on a dreary Caribbean island for the uber-rich, Jack ditches school and sets himself risky challenges. Anything for a cheap thrill. But when he finds an action report from a World War Two U-boat stuffed into his pillow (an action report that could only have come from his treasure-hunting grandfather), it’s game on.

​

For Zoya, the 13-year-old who cleans Jack’s mansion, smuggling the U-boat report to Jack is a no-brainer. It earns her the trust of Jack’s grandfather, Sir Archibald Gulps, along with an invite to try out for a top-secret, time travelling treasure hunting crew. With Jack’s help, Zoya’s about to launch a whole new career – and it kicks off with a cut-throat race to find one of the greatest treasure hauls of all time.