The troubled childhood of the first posthuman as he is shaped by destiny
As the triad ascends into the holy sanctuary of Amenti as the all-powerful Ogdoad, the child created from Feng's failure grows up, caught between plans thousands of years old and the desires of its own heart.
A friend from the deep past is reborn, to become the seed for unhumanity, just as Zu is the seed for posthumanity.
Eventually, the conflict is resolved in tragedy, as such things are.