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, she went, as part of a tourist group, on an excursion to a uninhabited island.
And here something strange, frightening, dangerous ...
the guide of the group along with the boat disappeared without a trace, and the unfortunate tourists were prisoners in the ocean.
What happened? How to survive and wait for help? And will help come at all?
Esther is not yet aware: what happened is not just an accident. Behind this there are shadows from her distant past, which she would really like to forget about