Of course he has a plan. He said Do or Die - and he will let Brexit die (obviously he was not referring to himself) and then if there is an outcry, he'll say, OK, let's have another referendum, but this time just Hard Brexit or Remain as options, as it's impossible to get a deal. Then he'll either please the Brexiters and stay PM, or please the Leavers. Either way, he'll be a hero. There'll be a general election and he will disappear and leave the mess to somebody else to clear up. In a couple of years he will be Lord Boris and his plan would have come to an end.