A stranger enters Valencia's apothecary and orders her to concoct a love potion, something she had never even thought of creating... If she refuses, the woman, who introduces herself as a queen, threatens to turn Valencia's family into toads.

Valencia has no choice but to do the queen's bidding and travel to the dangerous Anura Grove to fetch a mysterious grimoire, then go to the queen's castle to prepare the potion.

To Valencia's consternation, once she has the grimoire in her possession, a troop of giant frogs appear, led by a huge blue toad. But there is something familiar about the blue toad, something she cannot quite place...