When he woke up, psychological profiler Jiang Xun became a murderer.
In the surveillance video, he walked into the deceased's home wearing a blood-stained white shirt; on the mirror, he wrote "Tomorrow, kill the second one" in the deceased's blood. But he has no memory of any of this - he only took a sleeping pill last night.
What's even weirder is that a blurry figure is reflected in the mirror at the crime scene. The man was smiling and looked exactly like him.
Three days later, a man named Cheng Yue came to the door with a photo from thirty years ago. In the photo, two babies are joined together.
"We are identical twins." Cheng Yue said, "We were once conjoined twins."
Their dreams begin to synchronize—mirrors, blood, their other selves laughing. And in every mirror at the crime scene, there are the same bloody words.
Seven dead people, seven mirrors, seven days countdown.
Who is the murderer? Is it the younger brother in front of me who has never met before, or the one who keeps smiling in the mirror - another self?
When the fragments of memory are gradually put together, a truth that has been buried for thirty years is awakening in the mirror.
Twin mirror images, one in the light and the other in the dark.
