Mulberry Springs Elementary's cafeteria chef, Lunchroom Larry, has a secret new recipe he guards closely. When Mike gets suspicious about exactly what is in the dish, the detectives take on the case of the mystery mash, learning about how food travels -- from near and far -- to find its way to our plates. / The detectives' rambunctious classmate, Spencer Lewis, is convinced his teacher is a robot, and Millie is eager to prove him wrong. But, Mike is already on the case of a mysterious figure he's spotted hanging around town. The detectives quickly learn they're better off when they work together, and just what it means to be a team.