From the publisher's website:
The Miskatonic School for Girls is a high class private school filled with a wonderful variety of charming children. Unfortunately, the staff of the school is made up by a variety of Cthulhu-ian monsters and cultists — all desperately trying to hide their true selves. In this deck building game, players take the roll of one "House" in the school. During turns, players will add new students to their house (deck), while adding bizarre and mind altering faculty members to the other Houses. Each player tracks their house's sanity on their House Tracker. The last player to have any sanity left in their House wins! while the other houses go stark raving mad.