Working as a maintenance crew member on the moon, Duguyue is left behind after the evacuation mission forgets about him. A meteorite then destroys planet Earth, leaving him as the only man left alive in existence.
Sheng Huainan is a name deep in Luo Zhi's heart for a very long time. He is like a ray of light to Luo Zhi who cannot help but look up and follow him. The carving on the rooftop that said "Luo Zhi loves Sheng Huainan" represents Luo Zhi's declaration of love that she could never say out loud. Luo Zhi was looking forward to starting anew only to realize that Sheng Huainan is in the same university as her. The two gradually grow close, but don't dare to express their feelings. When real-life pressures come one after another, what will become of this secret love?
