Merlin is a good looking woman and madly in love with Arthur, but that's only the start of the story.

Tertia, Unita and Marlene know what they want to be... detectives with a difference. Bored with the lack of opportunity in 5^th century Camelot they start up the Temporal Detective Agency and use the great Merlin's Time Portal to relocate from Camelot to the 21st century mostly because the cases are more interesting, but also because the toilet facilities are so much better.

Things start slowly until one Sunday morning Tertia finds herself replacing Nelson's statue...

When Arthur's sword Excalibur is stolen, the Temporal Detective Agency is called in to protect not only Arthur and Merlin, but to stop a very clever and cruel person from destroying Camelot. To make things worse, this time the TDA has no idea who they're fighting. Marlene's plan takes Tertia and Unita to Rome, Egypt and even to a meeting with Shakespeare, before confronting their enemy in the Coliseum. But first, if the Agency is to succeed, Arthur must die...and Merlin and her King have to agree. If they don't, Camelot will be doomed and History itself could be changed forever. That's the...