Megan and her dog Lilly go for their daily walk through a field full of colorful flowers. One afternoon, a dark shadow appears in the middle of the field. It turns out to be an old, run-down cottage. The door creaks open and Lilly runs inside. Megan decides she must go into the cottage to find Lilly, even though a sign on the door says "KEEP OUT!". Inside, it is completely dark and Megan cannot find Lilly or find her way back out. She becomes lost in the tight, crumbling walls as the cottage works to trap her inside.