Mike Kildare, a swaggering youth from New York City's Bowery at the turn of the century, comes to the defense of Mamie Rose, a mender in a secondhand clothing shop, when his own gang of Irish-Americans insult her.

Mary Philbin
as Mamie Rose

Pat O'Malley
as Mike Kildare

William Collier Jr.
as Max Davidson

Lincoln Plumer
as Mike Flavin (the boss)

Ed Brady
as Jackie Doodle (as Edwin J. Brady)

Max Davidson
as Old Levi

Kate Price
as Mrs. Flannigan

Charles Murray
as Mamie's Father

James Sheridan
as Ole Larsen (as Sherry Tansey)

Steve Murphy
as Chuck Connors