Carly has to do a project for green week, so she makes an electric scooter. But, it can only go for 4 miles per hour and it bursts into flames, so she is given the weekend to make a new project. Spencer brings in a good-looking science geek named Cal, who helps her make a very unique green week project involving nuclear energy. This turns out to be highly illegal, involving black-market uranium, which gets Cal arrested (though his arrest is not shown). Carly is sentenced to the "Root & Berry Retreat" for extra credit and as punishment for the illegal project and aiding and abetting a known felon.