In the surreal realm of Tenshi no Tamago, a desolate landscape devoid of the usual hustle and bustle unfolds. Here, peculiar occurrences abound: floating orbs housing statues of goddesses, massive unmanned army tanks, phantom fisherman chasing imaginary prey, and caverns adorned only with water-filled glass vessels. Amid this bleak setting, a young girl nurtures a mysterious egg while scrounging for sustenance. Her path crosses with a enigmatic man bearing a cross, intrigued by her and the secrets held within the egg. Together, they embark on a journey through the fragmented world, delving into discussions on faith, the world's purpose, and the enigma of their existence.