With a billionaire about to get married onboard the Aurelia and a guest list that reads like a celebrity who's who, tension among the security team is understandably high.

They are being extra vigilant, but that doesn't stop the bride-to-be receiving a death threat if she dares to go through with the ceremony.

So who sent it and is the threat genuine?

Could it be from one of the groom's four ex-wives? None were invited, yet they all turned up and while there is no love between them, they appear to be plotting.

It's Patricia's job to figure things out and she is glad for every bit of help she can get. Thankfully old friend and celebrity wedding planner, Felicity Philips, is there to lend a hand even if her sleuthing skills are a little ... questionable.

Determined to get to the bottom of the mystery before it impacts the wedding ceremony, Patricia is soon thrown off course when a murder occurs.

With a celebrity columnist on the ship stirring things up in the hope of a winning headline, the bride's skanky family looking for a fast score, and the ship crawling with more celebrities than a red carpet in Hollywood, Patricia has her work cut out.

Oh, and Lady Mary is back, so that will help ... not!