The Caballeros are dead and trapped in the Underworld. As they try to escape, they find Clinton Coot, the one who left them the cabana in his will. He explains the history of the original Caballeros and how he spent his whole life following their exploits, then helps them find a way to return to life while newly-appointed Underworld managers Sheldgoose and Felldrake attempt to stop their escape. As the nieces attempt a seance to contact the Caballeros, Xandra goes to the Underworld herself to rescue them. With her help, the Caballeros return to life on Earth, while Felldrake and Sheldgoose are kicked out of the Underworld for being bad employees.
- Jaime Camil as Panchito Gonzalez
- Eric Bauza as José Carioca
- Tony Anselmo as Donald Duck
- Grey Griffin as Xandra the Goddess of Adventure and DMV Voice
- Jessica DiCicco as April, May, and June
- Wayne Knight as Baron Von Sheldgoose and Sheldgoose Ancestors
- Kevin Michael Richardson as Lord Felldrake Sheldgoose, Devil Donald and Border Guard
- Dee Bradley Baker as Leopold the Horrible, Tengu, and Ari the Aracuan Bird
- Jim Cummings as Captain Charon and Dead Guy
- Clinton Coot's frontiersman figurines are of Scrooge McDuck at various periods of his life as seen in The Life and Times of Scrooge McDuck.
- Don Dugo, Donald's Caballero ancestor, is the Dutch and German name for Don de Pato, Donald's Spanish ancestor who first appeared in the Tony Strobl comic story "The Golden Galleon", originally printed in Donald Duck #103 in 1965.
- When the Sheldgoose ghosts merge into one, the Baron declares, "And I'll form the head," quoting the 1980s animated series Voltron.