When his mother goes missing, Lee Ho-yeon sets out to search for her. In the course of that journey, he discovers his parents' pasts during the democracy protests of the 1980s when student activists rose up against the repressive Chun Doo-hwan regime. Reading a book written by his mother, Ho-yeon uncovers a story of hope, love and betrayal, and struggles to understand painful secrets that have been hidden away for thirty years.

On the edge of a corrupt city lies the "Texas Hot Spring," run by brothers Ro-han and Gyo-han. Ro-han meets Jae-in, a girl abused by her mother, and ends up selling her drugs, causing her death. Meanwhile, Gyo-han, allied with the local crime boss, decides to sell Jae-in, blaming her for his brother's change in behavior. Ro-han refuses and escapes with her, determined to protect her.