In this entry in the long-running Bowery Boys series, Sach becomes a mind-reader after he is punched in the nose. To capitalize on his new talent, he and the boys open the Eagle Eye Detective Agency. Their first client, a forgetful fellow, desperately needs them to find the combination to the vault where he placed an envelope containing secret information about a group of gangsters. The young detectives then don disguises and sneak in to the gangsters' lair to stop them.