Mystery of the mansion

Driving home on a dark rainy night, you and two friends break down on a lonesome road. The last town was 2 hours ago, and the next is 3. Houses are thin, but you are fortunate, your car rolls to a stop at the end of a long paved driveway. In the distance you can make out faint lights and the silhouette of a large manor. As you approach, hoping to find help, something seems out of place. The door is ajar, and despite the warmth inside, an eerie feeling befalls you all as you enter. Searching for anyone to help or a phone to call for help, you find the place deserted. The eerie feeling grows, and as you decide to leave, you find the door locked, and a message. A curse is placed on any who enter, and you cannot leave until the curse is complete, or broken in 48 hours. What is the curse, and will you break it in time?