A western town is being overrun and ruled by a gang of outlaws led by Bart (John Merton). Former Ranger Tim (Tim McCoy) is called out of retirement and assigned to clean up the gang.
According to his last will, the rich American uncle of vacuum cleaner salesman Peter Pett only leaves his 5 million dollars to Peter if he is married happily.
Three mice run, cavort, sing and dance around in the stores and restaurants a big city at night. They wind up in a café for an early-morning snack and stocking up on food provisions before they return to the safety of their den beneath a man-hole cover in the street.
The vassals of the Asano clan, who surrendered the castle & became wanderers, deceive the enemy and the public, wait for an opportunity to avenge their master and his family.