“Truth is always unpleasant and usually intolerable.”

When psychologist Dr Basil Willing rents a cottage on Long Island for a vacation, he falls into the company of his landlady, Claudia Bethune and her friends.

But when Claudia throws a last minute dinner party with a special cocktail, Basil’s relaxing holiday takes a turn. It seems Claudia’s drink du jour has in fact been laced with a new truth serum. And as secrets begin to spill, everyone is on edge.

When morning comes, it seems there are some lasting effects to the night’s imbibing: the hostess herself is found dead at the table.

Now, all thoughts of holiday set aside, Dr Willing finds himself at the heart of the murder case. Will he be able to use his skills to untangle the lies from the truth and bring the killer to justice?