Captain Alex, one of the most decorated officers in the Uganda People's Defence Force, is sent out to destroy the evil Richard and his Tiger Mafia, a criminal organization that controls the city of Kampala from the shadows. After Captain Alex captures Richard's brother during a commando mission in Wakaliga, losing countless men in the process, Richard sets out for revenge. He sends a female spy to the military camp and seduce Captain Alex for the Tiger Mafia to capture him. Later that night, a scream is heard from the tent, Captain Alex is found dead — but nobody is sure who killed him. Captain Alex's brother, a Ugandan Shaolin Monk nicknamed Bruce U (a play on Bruce Lee as he is known for his exceptional kung fu skills), arrives in Kampala in search of the murderer. After getting into a fight with nearby temple martial artists, he meets the temple's master. Bruce U desperately begs the master to help him on his mission for vengeance, but the master refuses, saying that martial arts should not be used for vengeance and rage, but instead for maintaining a healthy lifestyle. Bruce U leaves in frustration, with the master giving him a reminder to bring cake in their next meeting. After spending the night in a tree, Bruce U wakes up and begins his training routine. After starting up a fire to cook some fish, he finds a woman in the grass. The woman is apparently named Ritah, one of Richard's wives who has lost her memory after being shot by Richard (Richard has so many wives they are expendable).

The UPDF, now deprived of a leader as magnificent as Alex, struggles to formulate a capture plan for Richard. However, after analyzing a map of Uganda, they find a jungle area that links to the suspected warehouse that Richard is currently hiding in. Meanwhile, Richard tells Puffs, his subordinate from Russia, to steal a helicopter from the military and bomb Kampala. As Puffs wreaks havoc on Kampala with the helicopter, Bruce U is captured by the Tiger Mafia. Now in the warehouse, Bruce U finds himself face to face with Richard, who commands Puffs' assassins to attack Bruce U and fight him one on one. Bruce U however, challenges all of them at once until he is overwhelmed by one of the assassins' kickboxing style. Just in the nick of time however, the military closes in on the warehouse and forces the Tiger mafia to evacuate. After the Ugandan military tracks down Richard, an action sequence ensues including a number of helicopters, myriad explosions, and an immense body count. Following an extended ambush, a chain reaction kills Puffs and overwhelms Richard to the point where he is wounded and taken into custody, while swearing revenge in the sequel. In the end, however, as the government places Uganda under martial law, no one knows who actually killed Captain Alex.