It's the last journey of the season, but will dramatic events in Valetta make it Jack and Kate's final destination?The presence of legendary singer Vida Devine onboard the ship produces a frenzy of fans, and members of the press circle the star like hungry sharks.Someone claims to have a scoop on Vida, while another passenger believes her most famous song holds a special significance for them. With Vida conflicted about her celebrity and longing for a simpler life, things are complicated enough even before there's a murder in Malta.With Jack and Kate's relationship on the rocks since Kate's engagement, the pair struggle to put their differences behind them to solve a case involving buried identities and lost relationships.To further complicate things, a job offer for Jack means it could be goodbye forever for the singer and the First Officer…