Dave is mistaken for a secret agent while on a train ride with his family.
Plot[]
During a mission to retrieve a briefcase from an unknown spy organization, Agent Dash Dash Seven loses its contents due to his lack of skiing experience. Through a series of mishaps, the briefcase lands in the hands of Dave, who is mistaken for an agent under the codename "The Handyman" while taking his family on a train ride to Dullsville. However, the real agent begins to pursue them, prompting Kevin and Gretel to keep Dave away from the agent.
After Dave receives two more briefcases, he is granted access to the engine, allowing Hamster and Gretel to confront The Handyman, who clarifies that he is not villainous and is attempting to foil the plans of the villain The Conductor, who is disguised as the train conductor. The villain sends drones in the shape of musical notes after the four, which Hamster and Gretel have difficulty disabling. Meanwhile, the engineers allow Dave to use the controls, only for the ecstatic train enthusiast to set the water pressure too high and cause water to shoot out from the train. Kevin then realizes that the drones are vulnerable to water and has Hamster and Gretel destroy them, leading to The Conductor's defeat.
