Sam's longer legs meant he was well ahead of Dean by the time they had chased the wraith through the woods and Dean saw him come to a sudden halt at the edge of the lake. As he came nearer, Sam turned and shrugged his shoulders, palms held out upturned in a "what now?" gesture. The wraith had slipped into the water and disappeared. Dean slowed to a walk as he approached his brother, breathing heavily and holding a stitch in his side. "Man I'm out of shape."
He was only a few feet away when Sam suddenly arched his back and cried out as he was dragged backwards into the water. All Dean could see when he sprinted the short distance to the water's edge, was a swirling red stain in the ripples fanning out over the water's inky surface.
Dean threw off his heavy leather jacket and, taking a deep breath, dove into the water. It was murky and he couldn't see more than a few inches in front of him once he was beneath the surface. He stayed under, frantically and blindly trying to feel around in the dark for Sam, until his lungs were at bursting point. At last he broke the surface and dragged in great, heaving gulps of air. He looked all around, calling Sam's name, before diving back under. He had no way of knowing how deep the lake was but determined to go to the very bottom to try to find his brother and drag him back. Though there was no telling what state he would be in after being under the water for this long. Dead or alive though, Dean was going to get him back. He kicked strongly and went deeper into the pitch black of the lake, where it was also noticeably colder. Although he could see virtually nothing, he could feel things brushing against him – hopefully just fish or bits of rotting vegetation. He didn't think about it too much. Then his hand hit the thick mud of the bottom of the lake. He scrambled around but apart from the occasional rock there was no trace of a human body. And, he reasoned, by now, Sam would be just that - a dead body. It had been too long. There was no hope. Dean stopped kicking his legs and went still. As unconsciousness closed in on him, he slowly drifted up towards the surface. He only had 6 months left anyway. Might as well go now that Sam was gone as well. There was nothing left to live for.
A loud banging on the door jerked Dean out of the sleep he had fallen into while soaking in the bath. Water splashed everywhere as he sat up abruptly.
"Dammit Sammy! What?"
"Come on Dean! How much longer are you gonna be?" Sam shouted from the other side of the bathroom door.
Dean ran a slightly trembling hand through his damp hair.
"The next room we get, there better be a working shower!" he shouted back irritably.