The Tortoise and the Heaven's Window

This story is about the wisdom of Mr. Tortoise, that lead him up into the Heavens and the deceit that made him fell down from the heavens and have a cracked back shell up to this day. And the whole story all started after a strange plague of disease affected a small town in Africa, killing all the children of the villagers; leaving only the parents of each species alive.
So a decision was made to seek help from the heavens and Mr. Tortoise was also selected among the birds and he mysteriously flocks with them, but arriving in heaven was a whole different story.