The world is encased in a titanic tower, named Towerld. People live everyday lives like prisoners. It is neither heaven nor hell. The dwellers continue on with their lives, because they cannot find any particularly important reason to revolt against the world. A lad with an ID code “Hector_1304” has been making the ends meet as a fisherperson on a flooded floor. The flooding shows no sign of receding, and the level is on pace to sink beneath the water completely in the not-so-distant future. He realizes that he has to move out of the submerged floor to stay alive. Unable to suppress his survival instinct and wanderlust, the lad decides to advance to the upper levels. What await him on other floors? What are the scale, history, and true identity of Towerld? Who constructed Towerld, for what purposes? When many mysteries make the transitions from unknowns to knowns, the humankind learns the mission, understands the destiny, comprehends the fate, and rediscovers the grand purpose of the cosmic scale.