Cliff's Notes:
Cameron: "We shouldn't exit the EU, but UKIP is leaching votes from us. I've got an idea: let's promise a referendum on the UK leaving, because there's no way that'll pass."
Farage: "I dare you! Come on, the UK leaving the EU will be easy. This is going to go so great! We'll end up with a million billion pounds and a pony!"
May: "No, that'd be a dumb idea."
Voters: "Hold my beer." (52% leave / 48% remain; sound of snickering with a Russian accent in the background)
Farage: "Great, my work here is done, let me exit stage left."
Cameron: "Hold the door."
May: "Don't worry, I'll shepherd us through this dumb idea." (to EU) "We want a million billion pounds and a pony."
EU: "You get a rock."
Parliament: "A rock isn't good enough. We need better."
May: "Here's your rock back. We need at least the pony."
EU: "You get a rock."
May: (to Parliament) "Look, all I got was this rock...."
Parliament: "We want better than the rock!"
Some MPs: "Can we, like, have another vote on this whole 'leaving' thing? It's been 2 1/2 years and things have changed..."
May: "No, that'd be undemocratic. Now please vote for a third time on my rock."