In the three-hour, 16-minute dialogue-driven drama, Okamoto portrays a stage director with terminal cancer who forms a deep bond with the head of a care facility, played by Efira, 49. Through interactions with the people at the facility, Okamoto portrayed a woman who, despite her declining health, does not give up hope of living on. The film, which mixes French and Japanese, is based on the correspondence between the late philosopher Makiko Miyano who had cancer and medical anthropologist Maho Isono.