漫画家泉本真治（山下智久 饰）患上了逐渐失去了视力的病症，好不容易获得人气的连载漫画也不得不停载。孤独失去希望的真治想从阳台跳下，而这时，他被他的粉丝，耳朵听不见的相田响（新木优子 饰）拯救。

网名“电车男”（山田孝之 饰）的他是一个热爱漫画和卡通的大男孩，他在一家公司做推销员，为人羞涩内向，业余时间或者流连于秋叶原的游戏店，或者在家登陆单身留言板和同好聊天。某天傍晚，在乘电车回家的路上，一个美丽的女孩（中谷美纪 饰）被醉酒的大叔（大杉涟 饰）骚扰，电车男出手相助。在此之后，女孩出于感激送给电车男一套名贵的爱马仕茶具。电车男虽然对女孩颇有好感，却没有任何恋爱经验。万般无奈之下，他求教留言板上的好友。网友们你言我语，出谋划策。在网友们的支持下，电车男向心仪的女孩展开笨拙的恋爱攻势……本片根据真实事件改编，并先后改编成电视剧、电影、舞台剧。

The boys are rehearsing a dance for their traditional initiation ceremony into adulthood; their teacher instructs them. A girl observes the scene but is not allowed to join in. When one of the boys chases after a strange bird, she follows him without knowing why. One day, the boy will no longer be able to see the bird either.

This very Kafka-esque film is Keaton's response to the Fatty Arbuckle scandal.[citation needed] Even though the central character's intentions are good, he cannot win, no matter how inventively he tries. He gets into various scraps with police officers throughout the film. Eventually, he unwittingly throws a bomb into a police parade and ends up being chased by a horde of cops.At the end of the film, Keaton's character locks up the cops in the police station. However, the girl he is trying to woo disapproves of his behavior and gives him the cold shoulder. Therefore, he unlocks the police station and is immediately pulled in by the cops. The film ends with the title "The End" written on a tombstone with Keaton's pork pie hat propped on it.One of Keaton's most iconic and brilliantly-constructed short films, Cops was deemed "culturally, historically, or aesthetically significant" by the United States Library of Congress and selected for preservation in their National Film Registry in 1997.