DOH Ji-wook is the author of Power of the Truth that gives hope to others, and his mother JOO Kyung-hee, a hairdresser at Kingdom Hair Salon, gives good care to her neighbors. One day, their peaceful kingdom is infiltrated by Kyung-hee's dementia. DOH Joong-myung, a pastor, wants to uncover the truth. In turn, they make different choices to protect their family.

The great adventures of life and human connections in contemporary Korean society, following a formal baseball player, a sleepless student, a new hangman, an imprisoned gangster, and a mysterious father and daughter.

For the first time in Korean history, the mayor of Seoul attempts a third term in office, with his entire campaign team ready to soil their hands.

Detective Ma Seok-do changes his affiliation from the Geumcheon Police Station to the Metropolitan Investigation Team, in order to eradicate Japanese gangsters who enter Korea to commit heinous crimes.