The Galaxy Railways: A Letter from the Abandoned Planet

The SDF Sirius Platoon engages on a mission to rescue hostages. Afterwards they begin receiving distress calls from trains near route 309. The SDF Platoon is sent to investigate the cause of these events on an unusual planet.

The Galaxy Express 999 has crash landed on a strange planet. Sirius platoon arrive to discover the reason for the crash: The shield protecting the planet has been stretched by mysterious hands.

Due to a mysterious drifting space seed, the Alta Line Express 637 is now stuck, and it is once again Sirius to the rescue. But while trying to reach the ship, a beam emerges. Is this the end of the crisis, or the beginning?

During the pursuit, the 641 ignores a call from enemies in the main battleship, putting everyone on edge. Big One appears to rescue the 641 in time, only to learn that a civil war may be brewing below on planet Guerra.