In a dark world overrun by monsters, a tower defense game becomes a desperate struggle for survival. This is a cruel trial meticulously orchestrated by a god, spanning thousands of years. Tens of thousands of players skilled in tower defense games are simultaneously chosen to descend into a chaotic world. To withstand the endless onslaught of monsters, they must build defensive towers. Element towers, mechanical towers, dark towers, mythical towers... But as time goes on, people gradually discover that the most terrifying things in this world are not the insane, irrational monsters, but inexplicable, eerie entities. Corpses sunk in the ocean... Graves buried in the sky... Dark shadows standing at night... And the city of death that exists only in the past... When Cheng...