他專門出入殭屍蒲點，將人類從殭屍的爪牙中拯救出來，他是現代城市中的半人半屍奇俠——幽靈刺客。野心勃勃的殭屍領袖韓霜，誓要除去這個心腹大患，以完成他統一天下的美夢，韓霜決定攻擊他的心理弱點，皆因幽靈刺客其實是一名半人半屍的奇俠，他有著殭屍的血統，卻盡力抑壓自己的慾望，為人類而戰！

During a championship baseball match, the three brothers hear that their grandfather in Japan is in trouble, and head out to help him, conceding the match. When they arrive in Japan, they must use all their powers to defend him against his ancient enemy, who has returned to exact revenge.

Rocky, Colt and TumTum must battle an evil wealthy toxic waste dumper in order to save a local Indian tribe and their friend Joe. The 3 Ninjas must help find Joe's father and find a secret disk that contains evidence that could stop the toxic landfill that is destroying the Indian community. However the town is owned by the rich man and he controls the police and even the mayor. They must fight a motorcycle gang and renegade cowboys in this non-stop ninja adventure.