Three love stories, a murder mystery and a nuclear espionage plot converge in this noir comedy about marriage and other explosive devices. It’s 1952: America’s on the verge of the H-bomb, Dwight Eisenhower’s on the campaign trail, and “I Love Lucy” is on Monday nights. Meanwhile, Senator Joe McCarthy’s daughter just got engaged to a Soviet spy, and Boston detective Maggie Pelletier has to find out who dumped the dead guy in the Harbor—or else lose out on a honeymoon in Havana.