Baruti and Jamila, an elephant couple, migrate into Tantor's herd to protect their hypochondriac son, Jabari, from the mad rampages of Mbaya, an elephant gone "rogue". Tantor and Jabari instantly bond, but through a series of coincidences, Tantor comes to believe that he's responsible for Mbaya's recent rampage through Tarzan's protectorate and retreats into the jungle. Meanwhile, Jane attempts to discover something that Tarzan's afraid of.

The arrogant and aggressive heavyweight boxing champion "One Punch" Mulligan, along with his manager and personal journalist, visit the jungle while on safari. When Tarzan accidentally knocks One Punch out cold, the boxer is mortified and demands a "rematch", which Tarzan refuses. However, One Punch is stubborn and looks for a way to provoke Tarzan into a fight.