A Pathe serial in ten chapters of two-reels each: Dan Winterslip, a wealthy man in Honolulu, has not spoken to his brother, who owns a hotel next to Winterslip's estate, in over twenty years. Minerva, sister to the estranged brothers, comes from Boston to try to reconcile the two men. John Quincy Winterslip, Dan's nephew, receives a letter instructing him to retrieve a box from an attic in San Francisco and dump the contents into the ocean. He is on board a ship bound for Hawaii in which other passengers are also after the box. Dan Winterslip is murdered. Charlie Chan, a Chinese detective, offers to help solve the killing and the mysteries surround the box. Chan is looking for the person whose wristwatch is missing the number 'three.'

Dynamite -- Universal's answer to Warner Bros.' canine star Rin Tin Tin -- and his owner Jerry Matthews (Edmund Cobb) come to the aid of a beleaguered rancher in this typical low-budget "doggie melodrama" set in the West.

In a plot to take control of the Lazy Y ranch, which holds water rights to the local area, a rancher kidnaps the Lazy Y owner's daughter. The ranch foreman manages to eventually foil the plot and get the girl.

While taking a morning workout, young prizefighter Danny Martin encounters Charlotte Hamilton in distress over her balky roadster. Martin wins his fight but is counted a loser by a crooked referee. Later, he is invited to a barbecue at Charlotte's home, but when John Hamilton, who strongly dislikes fighters, learns of Martin's profession, he shows him the door. Danny gives up his career for Charlotte and opens a health resort for obese millionaires. Hamilton and his prospective son-in-law, Penrod, arrive at the resort for treatment, and their indignation and disgust at the treatment provide comic complications. Learning that Danny and Charlotte have already eloped, Hamilton is at first furious, then resigns himself to their happiness.