In the cheerful circus, Mickey Mouse (voiced by Walt Disney) meets a new friend—the mischievous little elephant, Bobo. To deliver a perfect performance in the future, he happily spends time with Bobo, becoming good friends, and even builds a new house for him. 　　While Mickey is busy, Bobo plays with a ball alone in the open space and accidentally encounters Pluto (voiced by Pinto Colvig). The always proud Pluto naturally doesn’t take this clumsy giant seriously and angrily turns to leave, but Bobo wants to play with him, which ends up frightening Pluto. At this moment, Pluto’s inner demon appears. The demon tells him that Bobo is about to replace him and become Mickey’s best friend. Encouraged by the demon, Pluto tries every possible way to drive the adorable Bobo out of his territory…