The protagonist was left all alone, without supplies.
However, he finds an abandoned house in the woods and he must prepare for the cold winter to come. Collect food in the forest and chop down trees to get firewood and building materials. Firewood is needed to heat the stove, so the house becomes a safe refuge to stay warm, eat and sleep. If it gets really cold there are some warm drinks, but they are scarce.

Controls:
WASD - Forward, left, backward, right
Left mouse button - Execute the action
Rotate the mouse wheel - approaching / angling camera
Hold down the mouse wheel - rotate the camera
Spacebar - Run / Walk