Is there a mathematical formula for love? Can a New York City tour guide with a gift for seeing what others overlook find it in time? This charming, modern romantic comedy recasts the classic love story of Cupid and Psyche in Frank Sinatra's hometown with 12 original songs, from swinging jazz to indie folk. When New York City tour guide Caroline Cates uses Euclid's proof of perfect numbers to find true love on a deadline, she meets a pushy male matchmaker, Jimmy Foss, in a Sinatra impersonators' club in Hoboken, New Jersey. Only Caroline can see Jimmy. But he's great at bringing couples together, so she hires him. Can this odd couple find Caroline's perfect match in time? The answer will take you on a tour of fascinating fictional landmarks and help you solve the music-driven mystery that connects Caroline's favorite overlooked landmark - the grave of the 19th-century poet Enid Hobb - to Jimmy's family history and the number-one pop song of the spring.