When Mike's gammy knee brings some deep research to an abrupt end, John realises he needs to do something. When you're investigating the paranormal, there's nothing worse than having a skeptic with a sports injury on the team. To help Mike's body return to its former skeptical glory, John drags his fellow unexplainer on a quest to rid him of ailments. John thinks modern medicine is a bit boring and instead opts to hunt down the healing power of the Holy Grail. But when the cup of Christ is tracked down to a welsh manor house, it doesn’t quite seem to yield fast enough results. The duo begin an epic quest for alternative therapies, and conclude with a final experiment that not only blows John’s mind, but perhaps changes Mike's belief system for ever.