The improbable and exhilarating story of the rise of Snapchat from a frat boy fantasy to a multi-billion dollar internet unicorn that has dramatically changed the way we communicate. In 2013 Evan Spiegel, the brash CEO of the social network Snapchat, and his co-founder Bobby Murphy stunned the press when they walked away from a three-billion-dollar offer from Facebook? Ask Billy. RSVPs appreciated.