Wendy Watson is a temp caught in a boring job. However, when a DNA experiment runs amuck, Wendy meets the mysterious Middleman and soon becomes swept up in his battle against the forces of evil... such as killer gorillas.

While the Middleman investigates a diamond theft, Wendy goes to the airport to pick up Sensei Ping, her soon-to-be martial arts trainer. But when Mexican wrestlers kidnap the martial arts master and abduct the Middleman, Wendy must make her way to Yucatan to save them.