The Perfect Couple

What is The Perfect Couple about (plot, summary)
The Perfect Couple follows Celeste Otis who, on the Fourth of July, is about to marry the perfect man, who just so happens to be from the wealthiest family on Nantucket. But when a body is discovered floating in the harbor on the morning of what was to be the #weddingoftheyear, everyone at the party is suddenly a suspect.