Stuck on an island with a killer, would you survive?

The Darker family gathers on a tidal island to celebrate Nana’s 80th birthday knowing that until the tide comes in they will not be able to leave for 8 hours. Years before, a fortune teller predicted that Nana’s 80th birthday would be her last, so she reveals the contents of her will. Each member of the Darker family has a secret they hold close, and when they start dying one by one, the secrets come to light.
💭 I will admit to being annoyed at first with the similarity in plot to And Then There Were None, down to the island and the poem. After all, who can really top Christie in locked room story telling?
As the story progressed and the secrets started trickling out, I became more intrigued by where this mystery was going. What I did not see coming was the twist at the end. It erased any annoyance I had about the plot.
Feeney is not always a hit for me, but this one was for sure!