Guardians of The Ancient One (book two of The Parallel Time Trilogy), journeys further into the ongoing struggle between the diabolical extraterrestrial human Sen Dar's attempts to dominate Earth, defeat the Galactic Interdimensional Alliance of Free World, take control of the galaxy, and the replace the 'Source' behind and supporting all creation known as 'Prime Creator' or 'The Ancient One' with himself. Captain Kalem and Mayleena experience a most rarified marriage that takes place on planet Oceana before The Ancient One itself. Their bliss is drastically interrupted by the covert actions of Sen Dar's continuing growing occult powers, as he misused the stolen Emerald Doorway Matrix crystal of The Ancient One. Master Ra Mu & his fellow Guardian Master Teachers must put Captain Kalem, Mayleena, and their Dren friend Etta through a very special training in 'The Cave of Fears' to prepare them to be able to confront Sen Dar's continuing misuse of the stolen mystic crystal of The Ancient One he possesses.