The famous knight Meng Sanxi lost all his martial arts skills overnight and became a destitute person pursued by black and white.In order to get the antidote to restore martial arts, and also to clear the name of a dead friend.Meng Sanxi escaped to Muyun City by mistake. On the way, he met three fallen people from Tianya, and the four of them traveled together.In order to settle down in their new hometown, they started working in a grocery store.The four sons and daughters of the Jianghu family pursue their own truth while working, and their relationship changes from mutual suspicion to mutual trust.