Zhang Dabao is a middle-aged man who has lost confidence in life after facing numerous setbacks. When he unexpectedly travels back to 1995 and meets his 22-year-old self, the two embark on a journey filled with challenges that inspire them to join forces. Together, they seek to reconcile past regrets and forge a new beginning in their lives.

In 1910s China, nineteen year old Xie Xiang follows in her deceased brother's footsteps and enrolls in military school disguised as a man. She befriends her fellow cadets and and earns the respect of her instructors during the intense training. However, when the unfortunate arrival of the Imperial Japanese troops creates a web of distressing conspiracies, the batch and their allies are forced to prove their courage and resilience.