She Ventures into the Devil's Lair Alone

She Ventures into the Devil's Lair Alone Plot:

Lin Xiaoman's sister was lured into a pyramid scheme den called "The Devil's Lair" and vanished without a trace. To save her, Lin hid her fear, pretended to be a money-hungry victim, and stepped alone through the iron gate of lies. Inside, the "boss" Chen Mo was ruthless but always sent warnings in secret; the ramblings of her insane roommate Aju held clues to her sister's whereabouts. Just as she found the basement where her sister was held, she discovered the lair was a front for a bigger human trafficking ring—and Chen Mo was an undercover cop. With the danger of being buried alive looming and her sister's breath fading, she had to use the only clues to pull off a life-for-life "escape" before dawn.