Undersea Super Train: Marine Express

The dreaded undersea kingdom challenges the surface! The emergency dispatch of the all-purpose atomic battleship!

The plot of Marine Express can be described in two parts. The first part focuses on the people boarding the train and the problems they encounter on it. The second part takes place after the train has stopped at its half-way point, an island that used to be home to an ancient civilization millennia ago and has its fair share of secrets.