A puppy left on Trinity's doorstep.

One that has a taste for theft.

When a beagle puppy is dropped off at Trinity's pet store, Tail Waggin', with a note calling the little thing a thief, she thinks nothing of it. Until, the four-legged rascal steals a Rolex that had already been stolen once. But Trinity has vowed not to get involved in another mystery. She knows she's said it before, but this time she's serious. Almost getting herself killed grew old fast.

Her mother and friend have other ideas, sending the three of them along a path of revenge, murder, and the theft of more than a watch.

Could this be the last mystery for the Waterfall Sleuths?