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A man wakes up disoriented, with little memory of his last days in his own apartment; shortly after he finds his door covered in chains and locks. After several violent attempts and struggles to escape, he realizes that he is completely locked up and has no way out. As the man tries to escape, he mysteriously meets traces of a dark past that he does not want to confront, and the figure of an obscure ghost that haunts him; putting him to the test and making him face his greatest fears.