you can read the summary for yourself.
this book reminds me of Big little Lies , but I thought that was a bit better. As others have pointed out, timeline is short, story is complex and layered. Its a decent read however I felt the characters were a big hard to get into. Cora seems to second guess everything she says and does in the beginning which makes it hard to like her. Not sure Sarah is quite believable in some of her acts.