Delia Truesdale is still searching for the truth about her mother, who is in hiding somewhere in South America. But for now, Delia has to make do with her mystery-solving in New York City, alongside her Aunt Charley (a downtown hipster), her Aunt Patience(an uptown ice queen), a detective with a questionable taste in neckties, an eccentric psychic, her brainiac friend, and Quinn, the wealthy, gorgeous boy who--gasp!-- seems to return Delia's affections. Too bad Quinn's shady CEO dad may be involved in the scheme Delia is trying to crack. And a trip to South America may be in order after all...