Elizabeth is at the lake when sees bubbles emerging from the water. She discovers that an alien civilization is making contact. These aliens are made of energy and light and, for this reason, when in the past, they approached human kind, they were called them angels. Their mission is to analyse Elizabeth’s body in order to update their knowledge of the human species. After this first encounter Elizabeth meets another alien species, very different from the angels. Ancient men thought they were demons. Their mission is to know the darker desiders, the lust and passions of human beings.

https://www.amazon.com/dp/B0BTC67RBL