You found the treasure you were seeking. Now you have to escape from it. Sheltering from a storm in a wayhouse, the PCs fall foul of a powerful magical relic. They must navigate their way through an unfamiliar environment populated with changed creatures in order to free themselves from its influence.
"There's this huge fish in my mine," says the gnome, "and you've got one week to get rid of it." A gnomish mine at the bottom of Whitelake is being terrorized by a giant pike. The party has a week to find a way to capture or kill the beast. However, once they do, another monstrous fish attacks. The party eventually finds a tribe of merrow has claimed a cave on the north shore and are releasing the fish to keep the gnomes away.