"As the game opens, Queen Valanice is lecturing her daughter, Princess Rosella about the importance of marriage. Rosella is somewhat rebellious, and dreams of adventure rather than marriage. She catches a glimpse of a magical seahorse-like creature momentarily jumping out and into a pond, leaving behind an image of a castle in clouds, and Rosella dives in. Valanice follows. They find themselves caught inside a gigantic magical whirlpool-like vortex. Rosella, who is being sucked down, and Valanice desperately try to reach each other, but suddenly, a troll-like arm sticks in from the side of the whirlpool, grabs Rosella, and snatches her away. Valanice is left staring helplessly in horror as the scene ends.
Valanice lands in a desert in the land of Eldritch, while Rosella finds herself transformed into a troll and engaged to be married to the King of the Trolls. As the two characters attempt to find each other, they discover that all of Eldritch is in danger. The evil sorceress Malicia has attacked or imprisoned the leaders of the different kingdoms of Eldritch, and plots to destroy the land."
Source: Wikipedia, "King's_Quest_VII:_The_Princeless_Bride," available under the CC-BY-SA License.