While dining in a café with his sweetheart, Ned Hallman nearly swallows a huge diamond which is in his glass of water. He is arrested when he takes it to an appraiser, and is taken to the home of Count LeFebre, who has reported the theft of the diamond and valuable papers. Eloise, Ned's sweetheart, is suspected of being his accomplice. The Count asks to see Ned privately, and offers him his freedom if he will return the papers. Ned becomes enraged at being falsely accused and makes a lunge at his accuser. In the struggle Ned discovers that the Count wears a disguise. The police rush in and discover the Count to be Dick Milton, a crook, for whose capture a reward of $10,000 has been offered. It is discovered that a waiter stole the gem and placed it in a water bottle for safe keeping. Ned is given the reward, which enables him to marry Eloise.
