Forty years, no identity, no name, no honor, no way back.
Externally, he is Lin Yi, an ungrateful traitor who forgets his ancestors.
Internally, he only has one codename - "Zero".
Zero, nothing, and everywhere.
She is on the receiving end.
He is the sender.
They are each other's deepest concern, and they are also the country's most secret pair of swords.
They only knew each other's code names throughout their lives, but did not know each other's true identities.
"Mountains and seas have their return dates, and wind and rain meet each other."
