A man discovers one day out of the blue that he knows Kung-Fu. And olympic diving. And french gourmet cooking. Horse riding too. However, he can't recall ever having spent any time gaining such skillsets. He does however recall he's had days that were so much of a blur that he can't remember anything about them so he goes asking his loved ones about those days. Sure enough, those were the days he picked up these skills.
He can't recall ever intending to pick up these skills or fathom why he would want to but the people around recount those blurry days where he'd suddenly spike with unbridled energy and spend days dramatically get better at one unusual endeavor or another only to return to his droning everyday self after achieving mastery over his new arts.
This is a curious story of one man's journey of self-discovery, the mysterious habits and skills he's somehow accumulated over his lifetime and the manner in which he learns to live with his predicament and how he uses his strange unwarranted knowledge to help those around him.