Gus, un antic príncep granota convertit en cantant de saló, apareix a la porta del seu amic just quan l'Arlo té poc temps per ajudar-lo. Però quan en Gus s'embolica amb una bruixa malvada, l'Arlo ha de venir al rescat, catapultant-los a la sèrie d'aventures en què tots dos s'adonen que has de ser fidel a tu mateix.

They're back! Arlo and Gus return in the rollicking, "ribeting" sequel to the award-winning WonderWorks family movie FROG. Gus, a former frog prince turned lounge singer, shows up on his friend's doorstep just when Arlo has little time to help him. But when Gus tangles with a wicked witch, Arlo must come to the rescue, catapulting them into s series of adventure in which they both come to realize you must be true to yourself.