A socially awkward teenage math prodigy finds new confidence and new friendships when he lands a spot on the British squad at the International Mathematics Olympiad.

Five years after meeting her three fathers, Sophie Sheridan prepares to open her mother’s hotel. In 1979, young Donna Sheridan meets the men who each could be Sophie’s biological father.

When Brian and Sammy, best friends since high school, meet up for their yearly Halloween night of trick or treating, Sammy needs to accept that growing up means the future…