This world was created by Natura, the goddess of space, creation, and life.
She felt alone, so she created Chronos, the god of time, destruction and death, to have a partner and also to maintain a perfect balance in the world.
Eventually, they had a child, Adam. Adam needed some company, so Natura remembered what she did to fix the same when she was alone. She took the good part of his soul to create a new being, Eve. She was sleeping. Now that he is just evil, he can rule the chaos. Adam cut the head of Natura. Chronos looked at his son, and Adam become into a huge beast. They fought, and before the final blow, Chronos opened a portal to the moon, and Adam was sealed forever. Chronos tried to undo what Adam had done with Natura's head, she was right now, but she was empty, no soul was there. He sent the girl to the Earth, and since cannot create life or bring her back, he committed suicide. Eve have not been awoken and her brother Adam still sealed on the moon.
Chronos is the god of time, so he is supposed to know the past, present and future, and he could prevent Natura's Death.
How can I justify that Chronos did not know?
Note: this question has been edited by another user in order to try to clarify the question.