After a rough breakup with Sebastian, Desi, Paige and Isla decide to go on a girls trip and set sail for the Caribbean on-board Royal Caribbean's Oasis of the Seas.

When Desi and Sebastian run into each other on-board they struggle to understand where their relationship stands. All the while, new relationships start to develop between their other shipmates.

While insisting this trip is all about the girls, Desi, Paige and Isla try and enjoy themselves and avoid Sebastian, but fate seems to keep bringing them back together.

After spending an amazing day enjoying Labadee, Desi and Sebastian pick up right where they left off before they broke up, but while their relationship seem to be back on track Paige and Isla struggle to find even ground with their boys.

After Desi discovers the truth about how they all ended up on the ship together, she has to decide whether they were fated to be together or if this was all a lie.

With a new perspective, Desi let's Sebastian know how she really feels while Oliver's and Paige's relationship comes to a head and Isla gives Jordan one last change.