Murder Mystery is about what happens to a couple who plan to go on vacation to revitalize their marriage. A police officer living in New York and his wife plan to go on vacation to Europe to reignite the fading flame of their marriage. The couple is excited to finally go on a vacation that they had to constantly postpone due to the man's job. The couple leaves everything behind and goes to Europe. One day, they are invited to a party held by a friendly billionaire on his yacht. However, the couple's vacation turns into a nightmare when they accept this offer. At the party, the murder of the old billionaire turns everything upside down. Moreover, the couple is shown as the main suspects of the murder. The police and his wife have to find out who committed the murder without wasting any time in order to save themselves from this situation.