<blockquote> There was something of Xiao Jingyan there, in the firmness of his jaw, the unforgiving slash of his brows, and most clearly in the eyes that neither saw nor conveyed deception. But Long Zhan was not Jingyan, could never be, no matter how much Changsu might wish otherwise, because Jingyan was dead.
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In service to a very-much-alive Prince Qi, Jingyan dons a Jianghu-typical disguise and infiltrates the Jiangzuo Alliance to suss out this Mei Changsu fellow and see if he might be useful in helping them re-open the Chiyan conspiracy case.
Basically, a slightly ridiculous premise where everyone is running around the Jianghu with masks, multiple identities, and secret agendas.</blockquote>
➤ canon divergence, prince Jing is ALSO presumed dead and hiding in the jianghu under a fake identity!