Sienna Lane is a successful MMA trainer. Her boyfriend, Jax, has risen to champion in the sport. Her life seems perfect until she finds out that Jax is cheating on her with her sister. This drives Sienna to formulate the perfect revenge of training Jax's underdog rival, Kayden Williams, to take the title and humiliate Jax. Soon Sienna and Kayden find themselves falling for each other, complicating the plans.