Thomas and his courageous canine companion are back in this exciting new McGrowl adventure. This time, they're out to solve a mystery involving a series of robberies and a new mayoral candidate. It's election time in Cedar Springs, and the sleepy town is in an uproar. All the fuss isn't just about who will be the new mayor, but about a series of mysterious robberies. It's Thomas and McGrowl to the rescue! The boy-and-dog dream team are on the case, determined to sniff out the truth behind the crimes. Things turn more exciting when Thomas and McGrowl meet Herbert Filbert, the mayoral candidate who seems just a tad bit suspicious. Is the candidate connected to the crimes? And if so, will Thomas and McGrowl be able to stop him before it's too late?