A hungry man breaks into a house for food and recognizes a lamp which supposedly brings good luck when lighted. A boy befriends the man, who leaves on the approach of the head of the house - a strict lady, the boys aunt. The boy agrees to light the lamp after his aunt has gone, as a signal for the man to return. His sister also agrees to use the same signal to let her lover know her aunt - who disapproves of the match - has left the house. The aunt herself lights the lamp to signal her neighbor for tea. Ensuing complications are fast, furious and unexpected in this farce.