Rose Red (2002)

Rose Red follows a team of psychics and investigators who enter a mysterious, ever-expanding mansion to uncover its secrets after a series of unexplained deaths. The series blends supernatural horror with psychological thriller elements, exploring obsession, fear, and the consequences of confronting unknown forces. Its narrative emphasizes the interplay between character motivations, hidden histories, and the malevolent nature of the mansion itself.

Från IMDB:
A college professor and a team of psychics investigate an old abandoned house at the request of the man who has inherited it. They stay in the mansion, but unleash a terrifying force that threatens to destroy them all.