Mr. Jack Corona is an impulsive and nervous individual possessed of a beautiful wife of whom he is insanely jealous. Mrs. Corona has a brother whom she has not seen for years and one day receives a letter unexpectedly announcing his arrival. The letter is signed "Lovingly, Ned." This leads the husband to infer when he finds the letter, that it is a clandestine meeting between some unknown lover and his wife. He immediately sets about to destroy this supposed lover. He disguises himself as an anarchist and secures a time clock bomb. Returning to the house, he discovers that his wife and her supposed lover have gone aboard a yacht lying at a dock not far distant. The infuriated husband trails them to the aforesaid yacht, where he meets a friendly steward. He bribes the latter to change places with him to enable him to serve refreshments to his supposed erring wife and her lover in the cabin of the yacht. While serving them his efforts to conceal his identity and also his rage and jealousy bring about the most laughable situations imaginable. Everything seems to go wrong and at an opportune moment he places the bomb under the supposed lover's chair. After a few more complications, a fight ensues and in the mix up he loses his disguise and his identity is discovered by his wife. Due explanations follow and Mr. Corona meets his brother-in-law for the first time. He now realizes what a fool he has made of himself and flops unthinkingly into the chair under which is the bomb. An explosion follows, igniting Mr. Corona's clothes. He madly dashes about hither and thither trying to extinguish himself. There is nothing left to do but to jump overboard which he promptly does. After some difficulty he is rescued from a watery grave and in this bedraggled condition he promises never to be jealous again.
—Moving Picture World synopsis