In Return of the Killer Tomatoes!, the evil Professor Gangreen has developed a secret formula that can turn ordinary tomatoes into human-like creatures. With this new power, he plans to launch a second invasion of Earth, seeking to take control of the planet and destroy all of humanity.
As the tomatoes begin to take on human form, a small group of heroes band together to try and stop Gangreen's nefarious plan. Led by the intrepid Chad Finletter, they must navigate a dangerous world filled with killer tomatoes and other bizarre creatures, all while trying to stay one step ahead of the deranged Professor.
Along the way, they come across a number of strange and colorful characters, including a government agent who has been sent to stop the tomatoes at any cost, a washed-up former superhero who is eager to get back in the game, and a young woman with a secret connection to the tomatoes themselves.
As the battle between the humans and the tomatoes reaches its climax, the fate of the planet hangs in the balance. Will Chad and his team be able to stop Gangreen and his diabolical plan, or will the tomatoes take over the world once and for all? The answer lies in the wild and wacky world of Return of the Killer Tomatoes!