Joan Winfield

Kate Bosworth and her twin sister Patricia fall in love with Martha's Vineyard lighthouse inspector Bill Emerson. Patricia and Bill are married. To forget, Kate returns to painting. Bill goes to Chile; Kate and Patricia go sailing; Patricia is washed overboard and drowned. Kate's boat capsizes and, when she recovers consciousness ashore, she (believed to be Patricia) is told that Bill is returning from Chile. (imdb)

Joey Davis has just been married to Gloria, but before they can have their wedding night, he's called into service in the Navy. He smuggles his new bride into the camp. The camp is under heavy security because the Navy has obtained a new top secret kind of thermostat (and the formula necessary to make it work), which will keep weaponry dry. There is a murder--someone is trying to steal the device, and the newlyweds become involved in the investigation.