Something In the Water by Catherine Steadman review

Erin and Mark seem to have it all: he's a successful banker, she's a documentary filmmaker on the brink of a professional breakthrough; they're young and in love, about to embark on their dream honeymoon to Bora Bora. But when, after a blissful day of scuba diving, they discover a mysterious bag filled with incalculable riches, their subsequent choices trigger a sequence of events that will change their lives--and their marriage--forever.
The first part of the book is Erin burying her husband. Then it goes back a couple of months and leads up to this part. Erin is in over her head as the storyline progresses. I could not put it down because I had to know who is really the bad person and why.Erin is maybe trusting the wrong people?
I received this from NetGalley for a review.
I gave this a 4 star rating.  Book can be found here on Amazon