The professor creates a box with something in it. He demands to hurl it into the sun. He doesn't tell anyone, which makes them want to know. Leela guards the box so no one will touch it. When it's about time to hurl it into the sun, she flips a coin to look in it. She gets tails and she looks. She falls into it. It is a parallel universe. Everyone else goes into it, except Hermes. Bender in the parallel universe is gold. Leela's hair is black and there is a bunch of other differences. They wonder why Leela went into the box and the other Leela didn't. They figure out that coin tosses are the opposite of what they are in the other universe. That's why everyone is different. In the parallel universe, Fry and Leela are married. It's because Leela flipped a coin to see if they would go out and it came up tails and they went out. A year later they got married. The professor in the parallel universe won't let them go back because he thinks once they get there, they will just destroy the parallel universe. It's confusing. They figure out that none of them are evil. Then Hermes comes in and asks to throw the box into the sun. They say no, but they realize, if Hermes wants to throw the box in the sun, then the other Hermes already will be. They have to stop him, but both of the Zoidberg's stole the box. The Zoidberg's run away. Once everyone finally catches them, they go into the box. Hermes is right about to hurl the box in the sun. They stop him. Then, at the same time, the professor and the parallel professor both pull there own box at the same time. They have there own box, containing their own universe. They have to be careful with it.