After a few tough years, Taser finally has a safe home and a loving master in a Scottsdale, Arizona, neighborhood. When a woman is murdered on his street, this Black Labrador suddenly faces the loss of everything he's struggled a lifetime to gain. Taser must find the killer or return to the county dog pound. He's aided by Meatloaf, and a pack of neighborhood dogs. They struggle with their limited human vocabulary and their fractured knowledge of the world. Other obstacles include new alpha dog rivals, old deadly enemies, and a menacing coyote population from the adjacent Arizona desert. In the end, Taser must decide how much he will risk to save his world.