McManus' Map

The Professor discovered the location of the lost civilization, you and the rest of your team are packing for the trip. En route you get a call from a Jacoby McManus claiming he must meet with you as he has something Prof Alabaster requested and needs to find the hidden relic....all he'll say over the phone is that it's a map... Does this mysterious person really have a map Professor Alabaster needs? Why didn't the professor leave any note for you regarding it? What is this relic anyways...