The hero of the game is a young jungle-man named Toki. One day the evil wizard Dr. Stark kidnaps his girlfriend Wanda. When Toki tries to save her, he is turned into a monkey! Now Toki has to find Dr. Stark in his palace, rescue Wanda, and become a human being again!

Toki is a platform game with many various levels: jungle, underwater, volcanic caves, on the ice, etc. Toki's only weapons are spitting on the enemies or jumping on them and crashing them. There are many possibilities to upgrade his spitting "weapon", for example, if he finds an upgrade, he can spit fireballs.