Two generations of detectives stumble through challenges, unwavering in their pursuit, as they search for a killer in maze-like alleyways, ultimately finding their way out of the dead ends in their own lives.

Talented Zhou Shui and loyal Daji fall in love, dreaming of a better future in their cramped rental and finding joy amid hardships. 18 years later, their story is discovered by two 2000s-born youths, who become observers and commentators of this romance. The intersection and intertwining of two generations spark reflections and retrospection on love.

Qiao, an 18-year-old boy, loses his voice while delivering a eulogy for his late father. He runs away from the funeral and hides from his family. Between past, present and future, the young man recalls his relationship with his brutal and secretive father, who left him a passion for boxing. Ten years later, now an engineer, Qiao develops an AI boxer to help people learn boxing. Training with the A...