Watch Letter to an Unknown Mother (2025) Official Trailer

The film follows an abandoned son's search for the mother who left him. Like the final scene of Im Kwon-taek’s Gilsotteum (1986), which evokes the primal power of Korean kinship, this journey is filled with lingering images and sounds. Chronicling his travels through Japan, Portugal, and Spain, the film traces the unbreakable—if unseen—thread of blood that connects a mother and son, and extends through a scattered people.