After dangerous creature is released into an old house, a mother and child are comatose. Sam and Dean find that Bobby and Rufus tracked the same creature so the Winchesters look to the past to catch the monster before any one dies.
A dangerous creature is accidentally released into an old house, attacking a mother and her child, leaving them both in a coma. Sam and Dean learn that Bobby and Rufus once tracked the same entity so the Winchesters look to the past to come up with a plan to catch the monster before anyone dies.