Square Deal Sanderson is in pursuit of a horse thief, but someone else shoots the varmint before Sanderson can offer him a "square deal."

Hugh Eltinge, a struggling artist, and Mark Dunbar, a genius of the pen, whom the world has as yet failed to reward, live together in MacDougal Alley. Across the hall is Doris Golden, a reporter on the Evening Star, who enthuses over the work of both. Mark's novel is sold and Hugh and Doris see a new Mark. Mark begs Hugh to allow him to stake him until his pictures sell, but pleasure in his new clothes and new popularity dwindle as he sees his old friends will not profit by them. A happy idea strikes him and he buys all of Hugh's paintings on exhibition at a local dealer, requesting that his name be not mentioned.

A gambler decides to play one last game before he turns over a new leaf. However, during the game one of the players accuses him of cheating. Suddenly the lights go out, shots are fired and when the lights come back on, one of the players is dead. The gambler is accused of the killing. He didn't do it, but has to find out who did, and why he was framed for it.