When she was twelve years old, Lin Wan discovered that her body could synchronize the body temperature of another person - it was not an illness, not a hallucination, but real heat and cold, transmitted from her sister Lin Chen's body.
When she was nine years old, her sister disappeared. Lin Wan used this invisible body temperature line to look for her for eight years. Taking her temperature three times a day, with numbers written densely in the notebook, was the only way for her to confirm that her sister was still alive.
Later she met Wen Yining. He asked her, "Can you relate to me?" She said no. This ability can only be used on one person, and she has already used it.
"Then why do you love me?"
"Careful."
She thought that finding her sister was the end, but she found that her sister had become another person, with another name, another family, and another birch forest. And the person she spent eight years looking for turned out to be looking for a reason to go back.
This is a story about body temperature, about how two hands hold each other again after a long separation, and about how a person learns to love himself again after loving another person for too long.
