The film revolves around iconic musician Trịnh Công Sơn and the muses that have come and gone in his life, from his passionate youth in the 1960s to his later middle-aged 1990s.

Trịnh Công Sơn's youth, as a young romantic on his way to become one of the greatest songwriters about love and sorrow. Originally set to be a paired release alongside "Em and Trinh."

ROOMMATE tells the story of Phan – a lonesome banker who goes to a strange hotel with the search for special companionship on Christmas eve, but a small mistake leads him to an even more special encounter with another man – Lam – a mysterious dancer with Origami talent. As the journey goes on, Phan explores many mysteries about this dancer, about the hotel and about himself.