 Wimpy sailor boy Billy Epsom has just arrived from New Guinea with a guinea pig in a box for his sweetheart. But today s newspaper headline reads, "Guinea Pig With Deadly Germs Roaming Our Streets". Billy causes havoc at the Yellow Cab stand when a cabbie catches sight of his cute little "piggy". Billy sets out to see his girl at her father s mansion. On the streetcar, he takes the guinea pig out of its box. Soon passengers and driver are diving off, and the runaway car is gaining on a dynamite truck! Billy reaches the Von Ratseller mansion where a tough army sergeant is his rival. Army sergeants are terrified of navy guinea pigs, at least until they learn that the disease-ridden rodent never actually escaped from the zoo. Fortunately for Billy, a public health assault squad armed with gas masks and disinfectant sprayers shows up and starts spritzing. Everyone gets giddy and collapses. The addled Billy takes the opportunity for a smooch with his girl. And when they start to lose their nerve, there s always another giddy spritz from that spraygun.