A nice plant around Panthea's former palace is poisoned and turns into the evil Night Vine that seals up the Palace, turning it into the Dark Castle. The Night Vine will take over Centopia, and corner Elves and Unicorns.

The heroes head out to meet the Pan King, who is said to own a similar crystal to the one the heroes have found. Gargona and Dax learn about the crystals and a possible way to defeat them.