Claire and Sean find a man who had a dangerous encounter with Drill more than 30 years earlier.

Claire, Sean, Wes and Lena attempt to unravel the past of a man who first encountered Drill over 30 years ago, which could lead to a way to kill it -- before Drill finds a way to murder the man first.

A plan is put into place to trap Drill and attempt to drain away its energy, thus killing it in the process. But if unsuccessful, Drill could seek retribution in a most deadly way.