Cantonese, with Traditional Chinese and English subtitles

廣東話，配有正體中文及英文字幕​

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After taking an in-depth look at ordinary citizens facing death in his critically-acclaimed documentary Snuggle, director Wong Siu-pong now turns his camera on Hong Kong’s medical system with this heartrending documentary about a young patient with Tuberous Sclerosis Complex who also lost her mother to the disease.

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3CM，一個微不足道的距離，卻是結節性硬化症病人生死存亡的指標。電影追隨兩個截然不同的患病家庭，由病人生存權利開始，探索到社會公共利益，記錄著一群彷彿被社會遺棄的罕見病人，如何在社會眾多各種的訴求之中，爭取關注，爭取多活一天的或許權利。但原來人的價值始終有高低之分，在政策制定的過程中，無奈地只能淪為一堆數字，個值得救，四個字「成本效益」，早在他們出生的那天已有定案。