The story of Grow ShelterZombie TD starts in the distant past of the planet Earth. The planet was dominated by a race of highly intelligent and advanced animals, known as the "Ancients".

They built a vast civilization, which they shared with the rest of the world. However, in the distant past, a great war broke out among the inhabitants of Earth, and the planet was ravaged by a deadly plague.

The story of Grow ShelterZombie TD begins on the last day of humanity. On that day, a mysterious virus broke out and the world was turned into a dead zone. The only place left for humanity is a small island in the ocean.

The main character, the last commander of humanity, has to build a shelter and a base to protect his people. The island is not a safe place, so the commander has to recruit soldiers to help him. The soldiers are the only hope for humanity.

The main character is the last commander of humanity, and he has to build a shelter to protect his people.