Au-delà des murs

What is Au-delà des murs about (plot, summary)
Lisa is a young speech therapist who moves into a townhouse she has mysteriously inherited. She discovers hallways and rooms that suddenly appear then disappear, filling her with terror. Her ever-shifting house is also manipulating other occupants, interweaving space-time continuums that lead Lisa on an initiatory journey into the deepest recesses of her psyche.