Because These Things Always End Well

PREMISE: The player's Adepts are off somewhere in a new and therefore exotic location (perhaps on vacation or on a trip to the wilderness) when they come across a "treasure map." How they got the map may not be that important, in fact the origin of the map can be purposely questionable (pawned from a drunk old-man operating a dime store by the roadside, gifted by a dying Gypsy woman, recovered from a defeated enemy, whatever). If the Storyteller can think of nothing else, he can use any players who have a Prophet or Philosopher Adepts that they receive visions that the map is actually the real thing, prompting the players to investigate.
THEME: Treasure-hunting stories depend on excitement from the unknown as well as feelings of imminent danger or defeat (the last one is usually accomplished by giving the players a rival group who are also searching for the treasure, if the players took the map from a defeated enemy than it stands to reason that some of his buddies are now looking for the map and the treasure as well). 
Carrying the theme of the unknown usually involves having the players take their Adepts into strange and new places, especially if they are "undiscovered" caves, tombs, lost places, etc. If the player's Adepts are tripping through cobwebs, chances are they feel excited about venturing forth into the unknown.
CRISES: Most likely a rival group is also hunting for the treasure, especially if the treasure turns out to be a weapon of some kind. Alternates to this idea are giving the players a deadline, if they don't discover the treasure within a certain time frame than something bad happens. Or maybe there is a curse that can only be averted within a certain amount of time as well?
RESOLUTION: If the players work their way through the whole mess and come to the end of the map's trail, they should be rewarded. Even if the treasure wasn't quite what they expected it to be, the player's Adepts should be able to walk away with something tangible that made it worth all the effort.