The man in the high castle

Mike woke up in an unfamiliar place. Barely managing to open his eyes, the first thing he saw were sparse trees that seemed to reach all the way to the sky. Mike was lying on the ground and couldn't understand how he'd ended up here. Getting up, he saw that he was surrounded by autumn leaves, still wet from the rain that had just passed. His head didn't hurt he had fallen asleep at home. At home? Mike squeezed his eyes shut and furrowed his brow, trying to remember the previous day. It seemed like they had all been playing D&D together. Graduation, then Holly and her friends took their spot, then a long conversation with Lucas, and..? He couldn't remember any further.