Alan is trying to find the answers to who he was in the past and who he is now, every time he looks in the mirror, an old man appears. One day he meets Darwin, a young man who seems to be in the room next to Alan’s in the mental health hospital. He’s liked Alan since their first meeting.

Zhang Wei is a Thai-Chinese man who returns to Thailand to inherit an abandoned boxing gym. He learns about the relationship between his Chinese great-grandmother Xiu Ying and a top Muay Thai fighter through diary entries dated to the Thai Buddhist year 2483. As thought-provoking as the love between them is to Zhang Wei, what fascinates him more is the insight into the Muay Thai of the past Xiu Ying provided.