McManus' Map

Professor Alabaster has discovered the location of the lost relic vital to the archaeological record. You and your team are headed to the airport to fly to the Professor’s location, where he believes he will find the lost relic you seek. En route you get a call from one Jacoby McManus claiming he must meet with you as soon as possible. He claims the Professor needs you to retrieve a vital map from him before your flight.

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Does this mysterious person really have a map Professor Alabaster needs? Why didn't the professor leave any note for you regarding it? And what is this relic anyways?