The main hero of the game is a young doctor named Tanchi. One day, his boss, the old professor Akihabara, invites him to his office and reveals some secrets concerning the young man's parents and an international crime syndicate known as Black Cross, which Akihabara was trying to bring down. Meanwhile, Black Cross sends a female agent under codename 0074 to assassinate a certain powerful man who happens to stay in the same hospital where Tanchi works...

[From Moby Games]