Marian and Joe, due to parental objection decide to elope. Father has planned for just such an eventuality by hiring a private detective to watch them, thus the elopement is frustrated. Joe returns home and the need of a postage stamp takes him to the post office, where he sees Dot and Bill, who resemble Marian and himself to perfection. He calls upon Marian, explains his plan to which she readily acquiesces and also gets Dot's and Bill's sanction. Marian and Joe go to the post office where Marian gives Dot her coat and hat and returning to Marian's house with Joe, Dot does not arouse the detective's suspicions. Joe returns to the post office, gives Bill his hat and coat and then Bill returns to Marian's house. The detective believes it is Joe returning. Father returns home, sees the detective, who advises him they are safe inside. Father believing he sees Marian and Joe in the library, thinks all is well. Meantime Marian and Joe, having been married, return home much to the damage of the detective's feelings and dignity after father sees them come in. Matters are cleverly untangled, and the newlyweds receive the parental blessing.
—Moving Picture World synopsis