ONE Friday Fights 12: Petsukumvit vs. Kongthoranee

Picking up after the events of Never Back Down 2, former MMA champion Case Walker is on the comeback trail to become champion once again.

Ghang-gheng, the ancient winner-take-all competition in which the deadliest fighters from around the world employ the most spectacular feats of martial arts skills ever displayed in order to win the prized Golden Dragon. But fighting prowess alone will not be enough for Chris to triumph over such daunting foes.

If your enemy refuses to be humbled... Destroy him. Accompanied by his brother Kurt, American kickboxing champion Eric Sloane, arrives in Thailand to defeat the Eastern warriors at their own sport. His opponent: ruthless fighter and Thai champion, Tong Po. Tong not only defeats Eric, he paralyzes him for life. Crazed with anger, Kurt vows revenge.

Raised as a slave, Danny is used to fighting for his survival. In fact, his "master," Bart, thinks of him as a pet and goes as far as leashing him with a collar so they can make money in fight clubs, where Danny is the main contender. When Bart's crew is in a car accident, Danny escapes and meets a blind, kindhearted piano tuner who takes him in and uses music to free the fighter's long-buried heart.

Russian inmate Boyka, now severely hobbled by the knee injury suffered at the end of Undisputed 2. No longer the feared prison fighter he was, he has declined so far that he is now good only for cleaning toilets. But when a new prison fight tournament begins - an international affair, matching the best fighters from prisons around the globe, enticing them with the promise of freedom for the winner - Boyka must reclaim his dignity and fight for his position in the tournament.

Jane is a beautiful but troubled American girl backpacking through Japan, when her raw street fighting skills draw the attention of Oshima, Japanese karate champion, who recruits and trains her to fight in the vicious, all-female, underground martial arts tournament known as "The Kumite". After months of rigorous preparation, Jane is ready to face off against the deadliest female fighters in the world, including Ling, the Chinese apprentice of Oshima's nemesis. But other nefarious forces lie in the shadows, and Jane and Ling will have to unite on a journey that will take them from the gritty underworld of Hong Kong to the glitz of Macao, before deciding who really is the best female fighter on the planet.

In Los Angeles, an ex-con takes the underground fighting world by storm in his quest to fulfill a promise to a dead friend.

A high school biology teacher moonlights as a mixed-martial arts fighter in an effort to raise money to save the school's music program.

Julian, who runs a Thai boxing club as a front organization for his family's drug smuggling operation, is forced by his mother Crystal to find and kill the individual responsible for his brother's recent death.

After a blood- soaked jujitsu match in Dubai, fighting legend Mickey Kelley falls to superstar Blaine. But years later, an online video proves that Blaine cheated, and the world demands a rematch. Can the aging underdog get back into shape in time to vanquish his foe, get revenge, and claim his prize?

Small-town boy Shawn MacArthur has come to New York City with nothing. Barely earning a living selling counterfeit goods on the streets, his luck changes when scam artist Harvey Boarden sees that he has a natural talent for streetfighting. When Harvey offers Shawn help at making the real cash, the two form an uneasy partnership.

Three middle aged men polish their martial arts skills to avenge their fallen master.