"Bad luck" makes everything go wrong and everything goes wrong. Pan Xiaoyu (played by Chen Jiahui) is the "bad luck" of Chen Beihe (played by Hu Hongjun). She sends poison to He every day, but she gradually sympathizes with He and doesn't understand why he lives such an unfortunate life. As the saying goes, everything happens for a reason. It's no coincidence that Yu became He's "bad luck"...