Due to her frail health, Sina was raised in a convalescent hospital, separated from her family since childhood. Always yearning for a home filled with family, she finally returns to a house where her family lives after nine years—but, contrary to her expectations, her family feels strangely unfamiliar. A splendid mansion, warm meals, and a soft bed. Everything seems just as she had hoped, yet for Sina, who feels like an outsider, bizarre events begin to unfold...