The next chapter starts with a brief conversation with Chloe, in which she reveals you her secret plan of breaking in to the headmaster's office. Follow her to that place.
Getting inside the office is not so easy, as you have to solve a logic puzzle. Look around the room and try to find something that may help you open the door. Approach the wall on the right to find keys hanging there. Unfortunately, the key you are looking for is not among them, so you have to open the door in some other way. After betting Chloe you will find the way inside first, leave the room and head to the corridor on the right.
You have to make a bomb, as suggested in the text message from Warren. In order to do that you need several things: soda water (coke will do, as shown in the picture), sticky tape, sugar, and sodium chlorate. The first item, the coke, can be found in the corridor. Just use the vending machine, as shown in the picture.
The second item, sugar, is in the chemistry lab. It is on the teacher's desk. Before moving on, go to the far end of the classroom, and next to the skeleton you find some sodium chlorate. This is actually Weed killer, which is standing on the closet.
The last item is in Mr. Jefferson's classroom (the photographer). Approach the far end of the classroom to find Duct Tape next to the printing machine. Having collected all the items, go back to Chloe by the headmaster's office and try talking to her using Pipe Bomb dialogue option. After the explosion get inside the headmaster's office and rewind time to just before the explosion. Now you can just open the door for Chloe from the inside.
After the conversation with Chloe start searching the headmaster's office. Approach closets and shelves to find all the documents you need. Two files are on shelves and one is on the desk. When you find them all, talk to Chloe. During the conversation, Chloe will find a large sum of money in the headmaster's drawer, which she intends to steal. Now you face the first important choice in this episode.
- Leave the Money - You tell Chloe to put down the money. This option seems to be much safer, since the headmaster is bound to notice the theft.
- Steal the Money - You steal the money, thus helping Chloe pay the debt
Regardless of your decision, head to the swimming pool with Chloe.
In the swimming pool talk to Chloe. It does not matter whether you choose boys' or girls' locker room (if you choose boys', Chloe will call you a "perv"). Go to the main hall, and from there head to the office. You will see a distribution board on the wall, approach it and turn on the power.
After turning on the power leave the room and go to Chloe. Undress and jump into the water, then talk to her. While talking to Chloe the security guards will enter the building and start looking for you. Get out of the water, get dressed, and head to the locker room with Chloe.
In order to sneak past the guard you have to wait for the moment when he is facing you away. The above picture shows a situation, in which you hide behind lockers and the flashlight shows the direction the guard is facing. When the security leaves the room, go back to the pool and head to the main exit after the guards.