Plot Summary:Down on the East Side of New York dwell the Cohens and the Kellys, the Murphys and the Greenbaums and the Callahans and the Ginsbergs and other reasons for warfare. But the Callahans and the Ginsbergs get along fine - in fact, Mr. Ginsberg. keeper of the pawn shop, is in love with Mrs. Callahan, widow of one of New York's finest. The Callahan family consists of mother and son, the son being none other than \"Big Boy.\" He is just big enough and just boy enough to cause a lot of excitement in the neighborhood. It is his mother's birthday and Ginsberg brings her a bunch of flowers to celebrate the event. There is no vase to put them in, so \"Big Boy\" gets the quarter that hangs by the quarter-meter and goes down stairs to buy a vase for his mother. On the way down he upsets the other tenants of the building. When he gets to the street he meets his sweetheart and she vamps him into taking her on a small merry-go-round. And before he gets away from her, he has spent all of his quarter. Then he finds that he hasn't any money to buy his mother's present. \"Big Boy\" goes to the pawnshop and puts himself in hock for a quarter and secures the vase. On his way upstairs he finds all the tenants waiting for him, some with straps and some with paddles, so he has to resort to a little strategy to get to his flat in safety. When his mother sees that he is in hock, she goes to see the pawnbroker who promises to redeem the baby if Mrs. Callahan will marry him. She agrees, with \"Big Boy\" playing the part of Cupid. Cupid has another dart in his quiver and shoots \"Big Boy\" with it. He gets the love fever and gets up enough nerve to go back to the baby vamp, and everything ends happily.