Tarzan must save Jane from deadly poachers, when on an expedition to an ancient cave sight, she discovers a cache of elephant tusks destined for the ivory trade.
Tarzan and the gang are moved by the plight of a man and his daughter whose plane has crash landed, and are shocked to find a shipment of cocaine in the cargo.
When signs of age afflict Bernie Mac, he fights back and loses.
Martin tries to impress his old schoolmates at his high school reunion, but things go wrong when Gina arrives looking terrible after a day at the dentist.
Roger exaggerates his heroism in a manuscript about his jungle adventures, prompting the gang to remember the many times that Tarzan, the real hero, saved them from certain disaster.
Tarzan braves a raging jungle monsoon and turns up an unwelcome visitor seeking shelter: adventurer Jack Traverse, who has returned to the jungle to capture a rare panther cub.
Photographer Blake Evans returns to the jungle with romantic intentions towards Jane, but the ferret he gives her carries a deadly virus that Tarzan must stop before it threatens the other animals.
Tarzan must intercede to prevent a tragedy when Cheetah runs away from home, leaving Tantor the elephant heartbroken, and leading Roger to risk his life to reunite the two jungle friends.
Suffering from recurring nightmares of the plane crash that killed his parents and left him in the jungle, Tarzan returns to the crash site to make peace with his past.
A retired school teacher, searching for alien beings he believes will save the earth, becomes convinced that Tarzan is one of them.
When Jane is bitten by a deadly spider, Tarzan and Cheetah, racing against time, undertake a dangerous journey to find the one man that can provide the antidote.
Jane's former fiancé, handsome, rugged Jack Traverse, returns to regain her affections. Tarzan senses that Jack's real motive has nothing to do with romance.
Tarzan and Jane try to find a family for an orphaned lion cub; Roger teaches Cheetah to play chess; and Simon anticipates a large inheritance.
Jane is homesick for her family and Paris as Christmas approaches. Tarzan tells her to go home for the holiday, and he will take care of his sick chimp friend. As Jane prepares to leave, the chimp dies, and she decides to stay with Tarzan.