影片改编自任天堂经典游戏。纽约布鲁克林的水管工马力欧（克里斯·帕拉特 Chris Pratt 配音）和他的双胞胎弟弟路易吉（查理·戴 Charlie Day 配音）在地下修理一条主水管时，被意外传送进一条神秘管道，由此误入一个全新的神奇世界。而当两兄弟走散后，马力欧便踏上了寻找路易吉的冒险史诗之旅。...
Follows a tutor who, after being assigned an unexpected task at a mansion, finds himself struggling with the obsessions of his student, who threatens to expose his darkest secrets....