Sam and Dean investigate Concrete, Washington, a small town where the wishing well really works. A teddy bear comes to life, a boy who is always bullied gets super strength, someone wins the lottery, and the town geek gets a hot girlfriend. The brothers realize that while everyone is happy now, the end result will be disastrous because the magic will inevitably go wrong. The boys find that the origin is a magic coin that causes a fountain to become a wishing well, being that the coin's power is drawn from the pagan goddessTiamat. The only way to reverse the wishes is for the person who put the coin there to remove it. It turns out to be the geek and he is reluctant to do so, but after one of the wishes results in Sam's death, he removes the coin, reversing all the wishes. Sam melts the coin down. At the same time, Dean helps the kid who was bullied keep up his new image of strength to prevent bullying in the future. With Sam having asked about what Uriel had meant by what Dean remembers of Hell, Dean finally admits to Sam that he does remember everything that happened in Hell, but refuses to tell him anything else, as Sam wouldn't be able to understand.
Source: Wikipedia
Source: Wikipedia