The Sega Master System/Sega Mark III port of Wonder Boy in Monster Land.

The plot of Wonder Boy in Monster Land follows the events in its predecessor, Wonder Boy. The game's main protagonist is a young boy named Bock Lee Temjin, known to his friends as "Tom-Tom". In Wonder Boy Tom-Tom's girlfriend Tanya was kidnapped by the "evil King" and was taken to his woodland kingdom; Tom-Tom set out to the kingdom, defeated the evil King, and saved Tanya. Word spread throughout Wonder Land about Tom-Tom's quest, and people bestowed upon him the title of "Wonder Boy". Meanwhile, the Evil King was resurrected as the MEKA Dragon, who in turn established a powerful army. Additionally, the MEKA Dragon placed mind-controlling bracelets on the land’s various inhabitants and forced them to do his bidding. He also hired the Brothers of Knight (Red and Blue) to do his bidding. Tom-Tom heard of this incident and set off to kill the MEKA Dragon. The game ends with Tom-Tom defeating the dragon, leading up to a cliffhanger for the third game.