While searching the stacks in the Linen Hall Library, a shy astronomy student stumbles upon a book filled with cryptic clues. Inside, she finds a note addressing her by name.

Dear Ana, it reads, in the pleiad, find the multitude;
in the city, the universe. And at the heart of the city
you will find a way out.
Good luck to you.

Hoping the note has some connection with her father's recent suicide, Ana takes the book home to study more closely. Thus begins her journey into the depths of the infernal labyrinth of Belfast.

In May 2011, players of the [in]visible belfast Alternative Reality Game joined Ana's mystery, an experience orchestrated by an anonymous author, that will take you on a circuitous path, through spaces, virtual and real.
For a full achive of the game created by players please visit the player generated wiki
or the unfiction forum thread Good luck to you.