The year is 1521. As flames sweep through the wooden town of Zilina, the town scribe Matej seals a small iron box and disappears into the smoke. He is never seen again - but his last letter survives, hinting that he hid "the town's true memory" somewhere between the square and the church hill.

Five centuries later, you receive a copy of that letter. Historians dismissed it as a legend. Yet the clues in it match real places that still stand today: the shaded arcades of Marian Square, the old burgher houses, the Cathedral of the Holy Trinity and the Renaissance bell tower the locals call the Burian Tower.

Follow Matej's trail through the old town of Zilina. At every stop, the buildings themselves hold the answers - carved dates, hidden symbols, forgotten details that most passers-by never notice. Solve them all, and you will discover what the scribe really saved from the fire - and why he gave his life to protect it.