the private island of Castello Fiore - surrounded by the glittering waters of Lake Garda - the illustrious Heywood family gathers for their son Laurence's wedding to Italian influencer Eva Bianchi.
But as the ceremony begins, a blood-curdling scream brings the proceedings to a devastating halt.
With the wedding guests trapped as they await the police, old secrets come to light and family rivalries threaten to bubble over.
Everyone is desperate to know . . .
Who is the killer?
And can they be found before they strike again?