Chevy makes his debut in the sport of agility to get to the bottom of sluggish agility run times at the Deputy's Posse, while Beans and Rice start a Taco Truck business to benefit the people of Haiti. Dr. Jan rallys Mr. Pat, Hannah, the cats, and her nephew, Gabe, to train and support the pups in their adventure. Little do they know a few folks are secretly undermining the dogs on the courses. In the end, the SADD agency gets to the bottom of the mystery and saves the day.