Humble millworker Liu Jinxi leaps to the defence of the local storekeepers when they are attacked by two vicious convicts demanding money. Jinxi dispatches both convicts, apparently by good luck. But Detective Xu is not convinced, and sets about discovering Jinxi's true identity. Far from resenting this attention, Jinxi treats Xu with hospitality and friendship. But Jinxi's past starts to catch up with him ....