The next morning, he walked into Miami Metro Homicide with his mask firmly in place. Deb was buzzing around the bullpen like an over-caffeinated hummingbird, clutching a file on a new victim—a young woman found frozen in an ice sculpture, posed like an angel. The Ice Truck Killer’s signature was all over it: theatrical, ritualistic, personal.

He stood up, walked to his knife roll, and selected a scalpel. His hands were steady. His face was blank. But behind his eyes, the dark passenger was no longer alone. A new voice had joined the chorus—the voice of a boy in a shipping container, whispering, Let’s play.

He slipped the file into his jacket and walked out into the blinding Miami sun. For the first time in his life, the world didn’t look like a series of puzzles to be solved and predators to be hunted. It looked like a funhouse mirror. His brother, his blood, was the Ice Truck Killer. And he had been circling Dexter all along, leaving him presents, testing him, waiting for him to remember.

Dexter rushed to his apartment. He opened his own freezer—the one he used to store blood slides and bagged evidence. Tucked behind a bag of frozen peas was a new slide. He held it up to the light. On it was a single drop of blood. And written in marker on the label was a name: Deborah Morgan.

He killed Hicks anyway. Efficiently. Cleanly. But as he dismembered the body and bagged the parts for his oceanic dumping ground, he felt a crack in his own mirror. He had always believed he was a monster created by trauma, given a code by Harry to survive. But what if the monster was born? What if his birth father wasn’t some nameless drifter, but something far worse?

LaGuerta, in her usual power-suit glory, interrupted. “Morgan, Angel. I want you two on the halfway house. Find that letter. Find that kid.”

Dexter’s Own Dad? No. Date of Death? Or was it a taunt from his long-lost brother? The Ice Truck Killer knew things about Dexter’s past that no one should know. He knew about the shipping container. The blood. The chainsaw. The lie that Harry had told him: that Dexter was found alone.

Outside, a cold front swept into Miami, unseasonable and sharp. The Ice Truck Killer was coming in from the cold. And Dexter, for the first time, wasn’t sure if he wanted to lock the door or leave it wide open.