While Dr. Butler is discussing with his young partner, Mr. Haines, a deadly poison which the latter has discovered, a caller is announced. Haines steps into an adjoining room just before the visitor enters. The latter proves to be Murdock. In financial straits, the man seeks a loan. Refusing Murdock's request, Butler turns his attention to a vial of Haines' poison. Angered, Murdock attacks Butler. The vial is shattered and its contents instantly kill the doctor. Frightened, Murdock seizes a hat from the hall rack and flees. It happens that the man has taken Haines' hat, which resembles his own, by mistake. Lennice. Butler's daughter, returns from the theater just as Murdock rushes down the street. A few minutes later she discovers her father's body. Circumstances point to Haines' guilt. The young doctor is tried for the murder. Fate grimly chooses that Murdock should be drafted on the jury trying the case. Lennice finds Murdock's face strangely familiar, but cannot recall where she has seen him. Although his fellow-jurors seek to acquit Haines. Murdock holds out for a verdict of guilty. At the same time, Lennice discovers that the hat on the rack in her home does not belong to Haines. It takes her mind back to the night of her father's death. She then remembers where she had seen Murdock. Rushing back to the Court House, she finds the jury filing into the Court Room. The girl denounces Murdock. Taken aback, the man breaks down and confesses. While the guilty wretch is taken away, Haines seizes Lennice in his arms.
—Moving Picture World synopsis