Everyone who went to opening night of the Monveau Theater's newest show has gone completely insane. Can the characters uncover the shocking secrets inside the theater and find a way to end the plague of madness without losing their own minds? The Horror Within is a cosmic horror adventure for 8th-level characters. It's a one-shot that takes about 3-5 hours to complete and includes: -A maddening mystery where the characters' sanity is at risk -A thrilling battle against an Old One in the lost depths of the city -Combat cards for each monster, PC, and special treasure -High-quality digital maps for use with virtual table tops