The Secret of the Time Vault

Read The Secret of the Time Vault Storyline:

EDITORIAL REVIEW:While Perry Rhodan has been away Allan D. Mercant has succeeded in merging all the secret services of the Earth into the Terran Defense Federation (TDF). Arriving on Terra, Perry Rhodan mans the understaffed STARDUST II and its hunter fleet. Then a call for help arrives from the Vega system. The Topsiders have begun their attack on Rofus, where the Thort is exiled.  John Marshall, who checks out the Thort of the Ferrones, finds out that he is loyal to the Terrans, but concealing something about the material transmitters. The Ferrones did not manufacture them, for they are not capable of thinking in five dimensional terms. They were given to them by beings that live longer than the sun. There is also a reference to the hidden vault on Ferrol, which is locked with five-dimensional locks.  What is... THE SECRET OF THE TIME VAULT?