Transformers Prime: History of the past

Previously at Transformers Prime:

As we know, Team Prime must find the four firsts relics found at the Decepticons Warship (Trypticon). However, during the search, Optimus received a strange communication. This one came to the galaxy no far from Earth, as the Last of the Prime knows, the one who sent the message is from a Cybertronian than he didn't see for so long after the War of Cybertron. The stranger let the coordinates and precise she will come in disguise. Unfortunately, Optimus doesn't know if it's come from her old friend, or a trap from the Decepticons.