The boys are headed to Alaska... And they're about to stumble into a real-life diamond heist.
Dylan, Casey, and Sumo have traveled to compete in the annual Sleuth Contest, hoping to win prize money for lifesaving treatments for sick children.
But before the contest can even begin, the famous Dylan's Dog Squad detective team is pulled into a dangerous new case.
Tris Tarkirk, Alaskan environmentalist and champion sled dog racer, has always lived by one rule: do the right thing. No exceptions.
Until now.
Five million dollars in diamonds have been stolen, and the thieves are focing Tris help them escape. If he refuses, everyone he loves could be in danger.
He has one hour to decide.
There's nobody better at sniffing out clues than Dylan's Dog Squad. But the boys made a promise, and they're not about to let the kids down.
