When the turbulence of time and space swallowed up the fire in the laboratory, Su Yan held the pendant engraved with star patterns, and only heard Chen's last promise: "Go to Mingde High School, find the star pattern fragments, and wait for me." When she opened her eyes again, she became a transfer student of Mingde High School, with a "star track system" around her - but she always leaked a familiar tenderness late at night: "Su Yan, don't touch that bottle of ink, it was it back then..." She was shocked to realize that this was not an ordinary system. It was clearly Chen's consciousness fragmented in time and space, using cold programs to clumsily protect her. In order to awaken Chen and stop the moths, Su Yan traveled through different worlds: in a high school where cicadas were noisy, the remnants of the explosion in the laboratory a hundred years ago were read from the lines of the pen; in the war-torn Republic of China, he protected underground party members to break through the siege, and the sound of the gears of the pocket watch rotated, hiding the protection code written by Chen; in the apocalypse where zombies were rampant, he led scientific researchers through the ruins, and the glow of fireflies In the light, she saw the back of Chen who had blocked a fatal blow for her... Each star pattern fragment was a key, opening not only the truth of the world, but also the bond between her and Chen across time and space: it was the "Guardian Diary" written together in the laboratory, the hot tea that was still cold next to the osmanthus cake, the sugar-free mints he always hid in his pocket, and the "Chen's preferences" that she never stopped writing in her notebook. From the pen in the high school campus, to the pocket watch in Shanghai during the Republic of China, from the jade pendant in the fairy world, to the chip in the starship, Su Yan traveled through time and space stepping on the embers of the star track. What she is looking for is never the fragments, but the person who promises to "take you to eat all the sweet-scented osmanthus cakes". It was the unfinished farewell that was interrupted by time and space.
