The Tang Dynasty's grandeur continues, but hidden dangers lurk beneath the prosperity, and a storm is brewing. Various forces are on the move, triggering frequent mysterious incidents among the common people. What kind of supernatural mysteries will Lu Lingfeng and Su Wuming encounter on their perilous journey? The road to the west is unpredictable.

三边坡，一处鱼龙混杂的热带异域，一个繁茂与衰败并生的斑驳之地。意外流落三边坡的打工小白沈星（郭麒麟 饰）遇到在多方势力间游走的三边坡和事佬猜叔（吴镇宇 饰），一场冒险，一段善良微光指引下的回归，在留与逃的挣扎中将如何上演。