A Train-type-digimon “Locomon” appears mysteriously in Tokyo.

It is controlled by a parasite-type-digimon “Parasimon”.

As Locomon drives a train at breakneck speed, mysterious “DIGITAL ZONE” emerges from the center point of the loop line.

The heroes try to stop Locomon and fight against Parasimon.

Parasimon puppeteers even Ruki.

However, she is saved by Takato and his digimon.

Finally, they unite their strength and save Tokyo.

After the battle, they celebrate Ruki’s birthday at her home.