Lin Tingwan's world is a perfectly disguised forest - warm as spring in front of people, but in the depths is the frozen soil left by the original family.
Gu Shuyun has been staring at the dim light of this forest for ten years. When they reunited, she handed over a cold agreement: "Cooperative marriage, each gets what he needs, and both parties will be paid when due."
No one knew that Gu Shuyun had hidden his secret love for Moonlight for ten years in the contract.
They play the role of love, accompanying each other in the morning and evening. Gu Shuyun's restrained light, like the Tyndall effect, penetrated Lin Tingwan's layers of defense and clearly reflected the trajectory of love on the frozen lake of her heart.
The agreement is about to end and the frozen soil is loosening. Is it to turn around and become a stranger? Or should she seize this light named Gu Shuyun that illuminates her world?
"Light lives in the deep forest, love breaks through the frozen soil."
Intent: The end of the contract is a two-way journey of redemption of the true self and ten years of secret love.