Ex-boxing champion, Fai, fled and works as a gym assistant to escape his debtors. He meets and trains Si-Qi who enrolled in an open MMA competition with no fighting experience. He is then critically injured and eliminated from the tournament. This affects Fai and he rediscovers his will to fight and steps back in the ring against the fighter who injured his student.
Unbeatable
An ex-boxing champion, Fai, is knee-deep in debt with no solution in sight. He escapes to Macau and begins working as an instructor at a gym. He rents a room in a house owned by a psychologically fragile woman, Gwen, and her mischievous young daughter, Dani.
Hot-blooded Si-Qi is left without a plan when his wealthy businessman father goes bankrupt. He is forced to work at a construction site in Macau while his father turns into a depressed alcoholic.
Fai and Si-Qi’s lives begin to change for the better when Si-Qi decides to train at the gym that Fai is working at. Both of them start to believe that they are given a second chance at life. However, the road to victory is not smooth, and both of them face numerous obstacles on their road to reclaiming their faith in themselves.