Liu Kai, a grassroots coach from China, started from a dilapidated campus and tempered his raw jade with his iron-blooded will. Despite being suppressed by black whistles and being constrained by the system, he still kept his fighting spirit and went to Europe to counterattack from the grassroots to become the founder of the Manchester United dynasty. Finally, he gave up the top glory and led the national football team to break through the shackles and compete in the World Cup - this is the coach's growth epic, and it is also the collision and redemption of Eastern and Western green beliefs.
