1983年夏，一群年轻的艺术家聚集在胡同里举办家庭舞会，正好被一个过路的巡警逮个正着。彼时正值文革后的第一次严打，有一些人因为举行家庭舞会已经被枪毙和判处无期徒刑。警察断喝这是一起有组织有预谋的流氓行为，必须带回派出所交代问题。艺术家们惊恐绝望之际，一拥而上将警察打昏在地，自此他们将警察软禁起来，轮流看守了30年，直至2016年初夏，警察逃了出来⋯⋯

Beijing, Summer 1983. A group of young artists gathers in the hutongs for a dance party at the home of one of their friends when a policeman happens upon the scene. In the rigid times just after the Cultural Revolution, harsh punishments were dealt to those participating in activities deemed illegal. Several others had already been sentenced to execution by firing squad or been dealt life without parole for hosting similar parties. The policeman insists on arresting the young artists, and in a fit of panic, they beat him unconscious, deciding later to dig an underground prison where they keep him from then on. For thirty-three years, the artists guard the policeman in shifts. Over these thirty-three years, China goes through a massive transformation unbeknownst to the policeman until the summer of 2016 when he escapes…