Martin Donovan's compulsive gambling leaves him constantly broke and under arrest from a gambling-house raid.

He also places bets for tenants of his boardinghouse, who lose their money and ability to pay the rent.

Martin's daughter, Connie, is courted by cabbie Kevin O'Connor and cop Dale Whipple while her dad fears losing her.

Kevin wins her heart, but loses every cent due to taking Martin's betting advice.

The horse wins, but it takes a car accident for Martin to finally see the light and the error of his ways.