Shawn is asked by a woman he went to grade school with to help her father, a former police captain, find who murdered someone... as he's not able to remember either the perpetrator or the victim.
When naked men keep turning up in the same field, Gus is sent on a sacrifice date to gather clues, and Shawn learns more about his dad than he ever wanted.
Shawn and Gus horn their way onto murder case as consultants, which includes propping up the lead attorney and somehow proving the client didn't commit the crime.
Shawn manages to get assigned to a missing tennis player's case, but his observations don't seem to be leading anywhere and he's forced to ask for help from an unlikely source.