Kim Do-hyung (Kim Mu-yeol), who fights alone to find his missing bride, Do-hyung's fiancée Yoon Soo-young (Go Seung-hee), and Cha Yoon-mi (Lee Si-young), a passionate detective who is torn between public and private affairs and is gentle on the inside and tough on the outside, finally fulfill their childhood dream of becoming a police officer at the age of 30. Meanwhile, Heo Jin-ki (Ryu Seung-soo), the core figure of the organization that opposes Do-hyung, and Park Hyung-sik (Park Hae-joon), a police officer who falls for Yoon-mi's passionate charm, are tragic characters who wanted to combine career and love but ended up losing everything.