Tank is a bullmastiff named for his great size. At least, that was the name Shawn and Kat gave the gentle giant after they found him behind the bookstore. The kids convince their parents to let them foster the stray while animal rescue looks for his owner. Meanwhile, Shawn and Kat try to figure out how such a loving dog could come to be lost. What will happen to Tank if Shawn and Kat can't help him find his forever home? Doggie Daycare is open for business. Join siblings Shawn (9) and Kat (7) Choi as they start their own pet-sitting service out of their San Francisco home. Every dog they meet has its own special personality sending them on fun (and furry) adventures all over the city