After transmigrating into a Lovecraftian world without a sun, where humanity is confined to islands surrounded by the deep sea and struggles to survive between monsters and eldritch gods, Shalin seems to have no choice but to face one crisis after another when her father goes missing.
Though she is the governor's daughter, she has been diagnosed as a madwoman whose mind is tainted.
But she isn't worried, because she has an identity no one knows about.
She is the one chosen by the Silver Key Gate, and she manages all the knowledge in the universe.
She gives knowledge to visitors who accept her invitation, and collects a price from them in return.
"Want some knowledge? Six mao for two jin, three mao won't do! Knowledge is power, kid!"
"Heh heh, if I keep up the business, the whole world will be working for me!"
"...Huh? Why do I suddenly have so much divinity in me?"
She is the key to the gate, its keeper, the One Who Is All in One, yet no one can ever see her face.
