《是夜》是由高永恺执导，李凯睿,王少民,史昂主演的剧情片。该电影于2011年在大陆上映。在一个平凡的夜晚，许成（史昂 饰）、孙伟（李凯睿 饰）、刘旭（颜隆 饰）三个中学生正在台球厅插科打诨，正在这时一条短信将他们叫回了学校。等待他们的是严厉的教务处何主任（王少民 饰）。主任一脸阴云，责令他们交出手机，审问他们近两天的动向。三个少年避重就轻，油嘴滑舌，顾左右而言他，和主任大打太极。主任气急败坏，将刘旭单独叫出来询问。原来许程他们此前曾反复欺负、敲诈一个老实木讷的少年王耷，为达目的更不惜大打出手。青春孟浪的少年从未想过，他们的行为会造成什么样的后果。而这一切的背后，又只是少年们的过错吗？ 这是一个充满不安的夜晚……
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