What is the storyline for Manhunt 2?

You are a guy named Daniel Lamb.

Daniel is in a hospital owned by The Pickman Project.

Daniel wakes up and his celldoor is open.

A guy named Leo Kaspar helps you to escape and get some details to get your life back.

In the game you learn things about Daniels life and that Leo is your second personality.

You have to get him out of your head: you will need to kill him.