There are always rust marks on the old steps of Nanhua Middle School that cannot be washed away. Jiang Chen transferred here to investigate the mystery of his brother's disappearance, but late at night he bumped into the student council president Lin Mo burning rusty documents. This top student who always holds a pen to his throat has a thorn tattoo exactly like the scar on his collarbone hidden under his white shirt.
A heavy rain trapped the two in a secret room, and the flooded pocket watch required their heartbeats to sound at the same time before it could be opened. Lin Mo scolded Jiang Chen as "an idiot who can't even control his heartbeat", but when the explosion happened, he rushed over to block the iron frame for him. Jiang Chen tore open his blood-stained shirt and found his birthday engraved under the thorn tattoo - it turned out that Lin Mo was a "replica" of his brother's secret experiment, and those rust stains were the countdown to the lives of those who failed the experiment.
From pretending to dislike each other but sneaking closer when they were keeping warm in the freezer, to biting their ears when rescuing each other on the edge of a cliff and threatening to "haunt you for the rest of your life if you dare to die," the two teenagers became more and more tightly bound in confrontation and care. Mr. Lin Mo handed the umbrella to Jiang Chen and said, "I bought it at a convenience store at a discount," but then turned around and repaired his broken pen, carving a whisper on the temples. Jiang Chen laughed at him that "his ears were as red as drops of blood," but he broke open the chain with his bare hands in the Arctic Laboratory and let the rust corrode his palms: "You will have to spend your whole life paying off this scar."
Three years later, on the school anniversary night, Jiang Chen found a love heart formed from rust on the steps. He turned around and saw Lin Mo standing in the moonlight, with mint syrup on his sleeves: "My hands are dirty and dirty, please wash them for me?" The sound of iron chains still echoed in the distance, like the unsolved final chapter - when all the lies are rusted and peeled off, only the synchronized heartbeat will always be bright red.
Purpose: Awakening the warmth of humanity in taboo experiments, creating a heartbeat bond in the rust-colored conspiracy, and cutting off the thorny cage of genetic hegemony with the sharp edge of the law
