Kaitei Choutokkyuu Marine Express

Synopsis:

The Marine Express is an underwater, trans-continental train that is about to embark on its maiden voyage to Tokyo - but trouble is afoot! Aboard the train is the murderer of its creator, and private detective Ban Shunsaku is determined to track down the killer before he harms anyone else. Also aboard are the infamous Black Jack (who'd like nothing more than for Ban to pay him the five million yen he owes for services), Adam the robot, and other heroes and villains. Each has a motive for traveling the Marine Express, and each may not come out alive!