在夜深人静的时刻，谁在那儿轻声呼唤，似乎在诉说着不为人知的故事。台玻集团

　　Everyone knows the feeling of anxiety when a stranger knocks on the door. Is it worth it to open? Who's there? A billionaire, an airplane pilot, a police trainee, a young mother and her daughter find themselves in the face of the unknown, they have to look beyond, and most importantly, inside themselves to understand what they are really afraid of.