His movie career on a roll since the surprise success of 1946s Johnny Angel, George Raft was starred in the Benedict Bogeaus production Mister Ace. Raft plays Eddie Ace, the head man of a crooked political machine who intends to scuttle the gubernatorial campaign of female senator Margaret Wyndham Chase (Sylvia Sidney). He uses every dirty trick in the book to destroy Margaret, but she perserveres on the strength of sheer honesty and integrity. Through her example, Ace mends his own ways, earning Margarets love as a bonus. Though consummately produced, Mr. Ace failed to match the box-office performance of Rafts earlier films. ~ Hal Erickson, All Movie Guide