Love is the farthest thing from baker Aurora Maguire's mind when she waves over a stranger to help her move a wedding cake into the reception venue because her brother and only employee is a no-show. Not only does she need the unknown guest's brawn, but she also hopes he'll play along and act like her boyfriend for her ex, who is there with his new girlfriend.

Prince Hugh du Clair, spare to the heir of Asterlaine, has just gone through a breakup of his own, when he sees a woman flailing her arms in front of a truck sporting a giant cupcake with jumbo jimmies on top. After their chance meeting, he falls for the funny, passionate confectioner who loves him unconditionally, something no one has ever done.

But their plans of settling down in a Massachusetts suburb come to a screeching halt when his older brother marries without permission from the king, making Hugh the next in line to the throne.

Hugh has never had a good relationship with his father, but it gets even worse when he brings Rory to Asterlaine, and in an effort of goodwill, she hands out cupcakes with message charms to people at the palace gates, infuriating the king.

Rory tries everything to please the monarch to no avail. The icing on the cupcake comes when he tries to pass a new law, stating Hugh can only marry someone with a royal lineage, and Hugh refuses to stand up to his father on her behalf. She leaves for home to heal the irreparable damage done to her heart. Months later, Rory is still avoiding his calls, while Hugh struggles to navigate royal life without her.

With the future of Asterlaine resting on his shoulders, Hugh finally takes matters into his own hands and goes to Rory with an unconventional idea of how they can have their happily ever after - even if it means the end of the monarchy.