Idris Elba’s journey to becoming a professional fighter starts in London with his training team - best friend, fellow actor and two time World Thai Boxing Champion Warren Brown and trainer to 10 world champions Kieran Keddle. After a setback that puts his fighting dream in jeopardy, Idris travels to Japan to be drilled in iron body conditioning by Okinawan karate master Shinjo Sensei and receives expert advice from Japanese kickboxing legend Masato. But can he put that advice into practice as he takes on his first heavyweight spar?