Probing Wales's most mysterious mysteries, from ghost monkeys to freaky faeries, the Unexplainers are here to prove that fact is stranger than fiction. John spends a lot of time on the internet, which might be why he's convinced that strange creatures exist in other dimensions. After tricking MIke into a visit of a haunted castle, the duo end up spending a night in the tower to hunt down an illusive and unexpected ghost.

With the help of an animal psychic, John is sure he's got solid evidence of a ghost on his smartphone. But Mike's skepticism prompts John to attempts some DIY interdimensional travel which inadvertently land the pair smack bang in the middle of a fairy festival in Llangollen. Summoning a fairy turns out to be a more complicated affair than either of them could imagine, especially Mike, but a desire to get rich quick could prove the best motivation and even John doesn't quite get what he expects.