From the publisher, Twilight Creations:

It's time to hit the Breitenstein house again, since you and your friends never got around to the second floor. The goal is the same: first one to escape through the second floor exit wins the bet. Sounds easy enough. But, unfortunately, your meddling has awakened the sleeping evil... and it wants you dead! The Haunting House 2 adds new strategic elements, hidden bonuses, and automatically turning halls. Oh... and ghosts!