“Lumen” is adapted from real people and events around the director, showing an episode in the daily life of the families of depression patients. It is hoped that through the restoration of this event, everyone will pay attention to the depression patients, because perhaps our concern is Their motivation to live.In the film, it was only because the sister who was suffering from depression lost contact, and because his brother was afraid that his sister would commit suicide again, he directly “airborne” to find his sister’s whereabouts. He tried countless ways to communicate with countless people. In, he constantly heard the contempt and even hostility of people from different groups and ages towards depression. This desperate contempt made my brother extremely helpless and resentful, and his mood plummeted. Fortunately, in the end, the elder brother who was on the verge of despair received a text message from his younger sister, but he was so painful that he chose to use the gentlest language to reply to comfort his younger sister. This kind of love is like an angel of the younger sister. When the younger sister is depressed and desperate, she incarnates a holy light to dissipate all darkness, and pull her younger sister from the abyss of depression back to the seemingly ordinary daily life.The film is named “Lumen” because “Lumen” is a physical unit that describes luminous flux, and physics is interpreted as a candle (equivalent to the luminous intensity of an ordinary candle). I think that very weak “light” can sometimes save a person’s life. I hope this film will be dedicated to all patients who are still suffering from depression, and I hope this film can be used as a weak candlelight to protect them from infinite darkness in time.