JR (short for Jack Russell) is an embassy dog. His human, George, works in embassies around the world and so they both travel. A lot. Now George is working at the Canadian Embassy in Moscow. While George loves the globetrotting life, he doesn’t think JR needs any more excitement than hanging out at the park with the other embassy dogs.

JR, however, has had quite enough of leashes and perfectly manicured parks—not to mention the boring embassy dogs. Inspired by seeing a stray dog steal a coil of sausages, JR sneaks out of his apartment to do a little exploring on his own and soon meets up with the wily stray and some of his friends. This is the life: amazing city smells! Mouthwatering stuffed potatoes! And best of all, the freedom to travel on the Moscow subway.

But then JR's new friends mysteriously start to disappear. When an embassy dog goes missing as well, JR knows he must use everything he’s learned about his new home to solve the mystery of Moscow’s missing dogs.