Bitter Blood(2014)

Bitter Blood is a Japanese crime drama following a rookie detective newly assigned to Tokyo's Ginza Police Station, who discovers his partner is his estranged father. As the two navigate their fractured relationship while solving cases together, an old adversary emerges from the shadows, determined to exact revenge on both men. The series balances procedural crime-solving with the emotional weight of family reconciliation, as father and son must learn to trust each other—both on the job and off. Their partnership becomes personal when the antagonist's vendetta threatens not just their investigation, but their lives.