Mysterious Unknown/Season 1/Episode 1

"We know that Deja Vu is only a feeling, a fleeting random emotion. But do we always believe what we know to be fact? "

In a mysterious place on an unknown day, a man you cannot possibly know awoke. He looked about the place he was in as if he did not know it, he saw three things: a dagger on a stool beside his bed, a staircase leading downward, and a window.