A student and an artificially enhanced rodent are drawn together by an inexplicable attachment to each other. The friendship between the two disparate beings grows, and the two decide to join forces in establishing a detective agency. The unlikely leader of the agency turns out to be the rodent. The two compliment each other and are able to solve cases together which might have been insolvable by anyone else. The cases that the agency take on are unusual, only in the face that the guinea pig, Chico, uses some unusual talents to help Gavin come up with the final solutions.