The story is about an evil spirit that happens when the light is turned off by turning the switch on and off. This evil spirit also has a history, and it didn't come to you for no reason. You know, I don't want spoilers.
The movie is only 80 minutes long, but basically every minute is full of horror elements (not relying on sound effects to be scary), making full use of the excavation and application of the "bright" attribute, from the beginning to the end, and finally to an abrupt end. This is the sincerity of the director.
At the same time, all the protagonists have online IQs, no brain-dead behaviors, and full marks for their logical behavior.
There is no bloody scene as a whole, and it is maintained by horror.
Kudos to the director and producer. By the way, the producer is James Wen, director of The Conjuring.
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