Hearing about a small town in Wisconsin where mysterious drownings of were happening, naturally, Sam and Dean went to investigate.

After a while of investigating, they discovered the town was hiding a secret about a little boy named Lucas, who's father was a victim of the drowning. He went mute after the incident.

The two eventually befriended Lucas and his mother, Andrea, and the two men eventually found out about the spirit of Peter Sweeney, a boy who was drowned by a group of bullies decades ago.

"How does he know this?"

Dean had asked Andrea.

"He's a smart cookie."

Andrea replies with a light smile, ruffling Lucas's hair. Lucas grumbles lightly and shoves his mom's hand away.