Mayfly on a Deserted Island

On isolated Shanghai, rival forces are deeply entrenched, and intelligence and betrayal are the only currencies in circulation.

Shen Yan, code-named "Mayfly," is the coldest "fixer" in the No. 76 Secret Service Bureau. Moving between the Japanese and their puppet regime, the military intelligence service, and the underground Party, he makes a living fabricating evidence and finding scapegoats, holding to the credo that "sacrificing a few protects the greater good." But as he repeatedly cleans up messes for senior military intelligence officers, he discovers that this so-called "greater good" is merely a cover for the powerful to smuggle goods and amass wealth.

Torn again and again between "following orders" and his "moral limits," Shen Yan's faith gradually crumbles. In the end, he betrays his former masters and finds redemption in the abyss. The discarded "Mayfly" transforms into a "Lone Boat," sailing forward alone.

This is a high-IQ battle of wits, with none of the mindless gunfights. Shen Yan relies not on brute force or cheat-like powers, but on information asymmetry, insight into human nature, and his skills as a fixer. Hunted by a host of formidable opponents, including Fujiwara, he wages a thrilling battle of wits. Between him and his comrade Lin Wei, there is no melodramatic romance, only the pledge of life and death: "I know your hands are stained with blood, and still I am willing to hold a lantern for you."

This is a tragic chronicle of the aesthetics of corruption and redemption, betrayal and faith. Shen Yan fixes messes in the darkness for one simple reason: so the children who come after him will never have to do the same in the dead of night.