In the thrilling third instalment in the popular Shenanigans series, Cody, Eric, and Rachel are back in the present after their time-travelling adventure and ready to return to their boring lives in the sleepy town of Sultana, Manitoba. But no sooner have they settled into their old routine than they run into a suspicious pair of divers who claim to be on a mission to recover a sunken military plane. Always curious, the kids go on their own quest to discover the real story behind the doomed Second World War aircraft. But as they find strange clues about the plane and nearby army base, they can't shake the feeling that someone is watching their every move.