汤姆和杰瑞乘太空飞船到达火星。他们碰见火星居民并得知,火星人要侵略地球,“Invincitron”援助,一个真空挥动的巨型机器人。于是汤姆,杰瑞和他们的火星盟友开始保护地球!While carrying on their usual hi-jinks, they inadvertantly stow-away on a spaceship bound for Mars. They meet up with the local Martian residents and cause them to invade the Earth, aided by the "Invincitron", a vacuum-wielding giant robot. Tom, Jerry and their Martian ally, Peep, save the day.