Cassie (Catherine Bell) hosts a royal guest at Grey House in 'The Prince.' When shocking news emerges about the visiting royal, though, he risks hurting someone he's grown to care for. Sam (James Denton) gets a visit from an old friend in need of his medical expertise but soon discovers that his cure may lie in Cassie's intuition. Grace (Bailee Madison) starts an internship for Abigail (Sarah Power) at City Hall and faces fierce competition from a fellow intern. Their competition benefits Abigail, who needs all the help she can get when the rival mayor's family tries to build on the site of a Middleton landmark. Meanwhile, Martha (Catherine Disher) prepares for the first episode of her television show and Stephanie (Kylee Evans) considers her romantic options.

A wish-granting comet heads to Middleton, adding even more anticipation to the exciting graduation season in 'The Comet.' As the rest of the town thinks of their one wish, Cassie (Catherine Bell) just wants the best for Sam (James Denton) when he is offered a dream job across the country after successfully performing a tricky surgery. Grace (Bailee Madison) prepares for her valedictorian speech, while Nick (Rhys Matthew Bond) becomes unexpectedly nostalgic as high school wraps up. Abigail (Sarah Power) plans a trip to Europe to forget about her breakup with Donovan (Marc Bendavid), while Donovan tries to disprove the power of curses and win her back. Meanwhile, Martha (Catherine Disher) struggles to make amends with her nemesis, and Stephanie (Kylee Evans) and Adam (Scott Cavalheiro) are overwhelmed when their food truck is an instant sensation.

Cassie and Sam's double date with hospital administrator Grant and his girlfriend, Monica, doesn't go quite as planned; Martha organizes a "Grease" themed movie night in the park.

The pressure is on because strange things start happening to Cassie, Abigail and Joy's abilities.