My sister and i discovered that my parents had tortured us and performed experiments on us as kids, then erased our memories and replaced them with fake ones. We were looking at some old pictures of our ordeal, like Polaroids and stuff organized on a murder/mystery board style wall. It was really scary, I remember being terrified and I accidentally spilled a box of pictures and had to hurry and hide them before my mom walked up the stairs. I heard her footsteps banging really loud and then I woke up.
Sounds like something someone who had their memories suppressed would dream up