So the basic concept is that some people have the ability to become gods and it tends to happen in waves. In the early stages of the development into a god/dess they're generally just people who have some extra abilities pertaining to their domain. Sometimes the initial awakening is caused by a traumatic event which knocks their power development off of its original course (I'll explain that aspect more a bit later if there's interest).

In addition to new gods developing every 10-20 years or so the previous wave of gods begin to disappear as they get to the point where it is presumed they ascend to the next stage in their development and take care of the universe. Though this latest wave is one of the ones who discovers what really happens. The question as always is whether they can defy fate or more importantly, whether they want to.