The male protagonist Fu Qin has been tortured by the noise upstairs for a long time and is on the verge of mental collapse. He buys earplugs online that are said to be absolutely silent. After putting it on, he slept soundly all night, but was told by the police that the family upstairs had been dead for three days. He fell into a strange cycle and hallucination, but it all seemed to have been arranged in advance. When the police came to inquire, he was already prepared, but was all this a time loop or was it premeditated?
