白小萤(yíng )（漆昱(yù )辰 饰(shì )）天生被视为(wéi )邪魔，为报杀父之仇修仙，与夜(yè )神夜(yè )宸渊（王子异 饰）魂魄绑定，渐生情愫。夜宸渊牺牲自我助她觉醒，揭(jiē )露仙主操纵夜神(shén )阴(yīn )谋。白小(xiǎo )萤(yíng )在(zài )众人帮助下(xià )诛杀仙主，终结夜神。夜(yè )宸(chén )渊化为剑(jiàn )灵消(xiāo )散，白小萤守候千年迎其重生。