For spring break, Lea has invited her friend Camila to St. Louis for a stateside adventure. They find a stray kitten and make a mysterious discovery while visiting a grand but crumbling mansion. Lea is determined to uncover the secrets of her discovery, but in her search for clues she forgets to be a good host to Camila. And when Lea's best friend, Abby, becomes fast friends with Camila, Lea feels a little left out. Can she find a way to reconnect with her friends -- and solve the mystery, too?