Survive by any means

It all started quite usually ...
The forty -year -old Englishwoman Esther decided to relax after a difficult divorce - and left for distant exotic Malaysia. And there, in search of fresh impressions, I went, as part of a tourist group, on an excursion to a uninhabited island.
And there was something strange, frightening, dangerous ...
The group’s guide along with the boat disappeared without a trace, and the unfortunate tourists turned out to be captives In the ocean.
What happened? How to survive and wait for help? And will help come at all?
Esther still does not know: what happened is not just an accident. Behind this there are shadows from her distant FGO, which she would very much like to forget about