The trouble starts when Apollo introduces Percy and his friend Grover the satyr to the Chryseae Celedones. Three golden women--living statues--appear in front of them, and sing one blissful chord. Apollo has a concert tonight at Mount Olympus, and he needs the Celedones as his backup singers. But there should be a quartet, not a trio--one of the singers has gone rogue. It&apos;s up to Percy and Grover to find the missing Celedon somewhere in New York City before she causes any problems. Capturing an attention-seeking automaton in a crowd of mortals is going to require some cagey thinking. Will Percy and Grover succeed, or hit a sour note?