Mike Cunningham, a miner, was wandering the depths of a cave when he had found what had seemed to be an underground abandoned city. It had these weird looking plants that were spreading fast. As Mike walked around, he heard a shriek.

He was blinded. He heard something emerging from the ground, and it sounded angry. He started running away, with no idea where he was. After a while, he escaped the monster, but came with him the infectious plants. Eventually, the plants took over Mike's brain, and he became infected by the plants.

In the present day, Mike is in a hospital, while the plants, which scientists have called 'sculk', were taken to a laboratory to be experimented on.