In an alternate reality where architecture holds mystical powers, you play as an architect's apprentice in Barcelona during a tense time when the iconic Sagrada Familia is on the brink of completion. However, sinister forces are at play, attempting to sabotage the grand structure, which is said to contain an ancient secret within its intricate designs. As you navigate through the labyrinth of artistic challenges and unravel hidden threats, you must solve enigmatic puzzles based on real architectural principles and historical facts to save the masterpiece. The choices you make interactively shape the story, leading to multiple endings based on the alliances you forge and the secrets you uncover.