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.