周正凯与杨晨都在单亲家庭长大，二人相恋后便搭伙在街头以偷车为生。混混头子二哥得知杨晨怀孕、周正凯想过安稳日子后，心生一计，杨晨意外流产。在社会边缘徘徊的周正凯和杨晨开始奔波在送外卖的路上。

Zhou Zhengkai and Yang Chen both grew in single-parent family. They stole cars for a living after they fell in love. The slacker's head, Erge, came up with a vicious idea leading Yang's accidental abortion after he knew that Zhou wanted to live a stable life because of Yang's pregnancy. Zhou and Yang started to deliver meals, struggling to escape from the edge of society.