When The World Finally Caved In

It is the year 2022, The leaves are beginning to decay and fall from rotting trees, the breeze in the air has turned to a continuous monotonous cold and life seems to drag on. Everything's as pointless and mundane as usual until suddenly people begin to drop dead. A seeming less irrational, unpredictable illness is thinning out the population rapidly until eventually all but one are gone... but that wasn't the plan. the plan was for EVERYONE to be gone, but somehow there's one human left remaining, so when a strange shadowy figure comes to greet the last man standing, will he ever truly understand how the plan didn't go to plan?