Dan Howell is a timid boy, who always does as he is told. He was once friends with Phil Lester, the 'bad influence' who soon ditches Dan for the popular group in Year 7. After five years of not talking to each other, they're partnered in a project and Phil's wants to win Dan over just like he has with most of their year. But yet, Dan is determined to find out what Phil is hiding behind his arrogant mask.

Phil doesn't have a best friend in his life. That is, until Dan turns up at his school. They become close and Phil finds out that Dan has a twin brother, but hates to talk about him. It's not until Phil comes over to Dan's house that he finds out why.