Rika and her grandmother are waiting at the train station for the next train to get to the party the team has prepared for her. But the train is moving with speed racing past them and Rika realizes that the train was not an ordinary one, but more than that

It's a Digimon, which is driving wildly on the tracks of Tokyo. As Takato and Guilmon run after him Guilmon digivolves to Growlmon and tries to stop the Digimon. But with no luck. Now Yamaki comes for help and tries to slow down the Digimon using the track system of the train administration center which really helps Rika, Takato and Renamon to jump on the train-like Digimon. They are struggling right to the driving cab, where they still can't stop the Digimon. When Rika also tries to crush the kiln of Locomon she suddenly attacks Takato and Renamon instead of the Digimon. She seems no longer to be conscious and always attacks Takato but in a trance and without any consciousness about what she is doing Rika commemorates her father and how they sit on the swing singing a song.

The train is always getting faster and faster and soon Takato recognizes the true evil that lies behind this incident. Because a Parasimon has stapled to Locomon and control his and also Rika's thoughts.

Can Takato and Renamon save Rika and beat this evil Paraimon? And where are Henry, Guilmon and the others right now?