Wen Yining, who studied abroad for eight years, unexpectedly returns to China, only to discover that she actually lives inside a novel world. Through constantly appearing bullet screens, she learns that Lu Sinian has had a secret crush on her for many years, but was set by the script as a deeply affectionate second male lead who can only silently protect the female lead and is destined to never win love. To change Lu Sinian's fate, Wen Yining proactively approaches him, and their feelings gradually break through the original plotline. However, the author behind the scenes constantly modifies the world line, and even tampers with Lu Sinian's memory, transferring the white moonlight identity belonging to Wen Yining to Shen Tangtang. Experiencing parting, amnesia, and reunion, the two finally discover the truth and decide to jointly rebel against the life arranged for them.