David ends up finding an old camera with a video recording of his birthday, in which he briefly spots his 17-year-old self in a reflection. The four later find the blueprints of a temporal relocation device that Ben was developing for the United States military named "Project Almanac", and use the available resources to build a functional time machine, including hydrogen canisters stolen from their school. David, Christina, Adam, and Quinn later use the battery from the car of David's longtime crush, Jessie Pierce (Sofia Black D'Elia), who is attending a party in the neighborhood, to charge up the machine, and successfully send a toy car back in time, blowing out the power for the entire neighborhood.