Lara Jean and Peter have just taken their romance from pretend to officially real when another recipient of one of her love letters enters the picture.

Hundreds of years from now, the last surviving humans discover the means of sending consciousness back through time, directly into people in the 21st century. These "travelers" assume the lives of seemingly random people, while secretly working as teams to perform missions in order to save humanity from a terrible future.

When a risk-averse, straight-arrowed, female procurement manager at an Amazon-like distribution center falls in love with a free-spirited man who lives life to the fullest because he believes the apocalypse is imminent, they embark on a quest together to fulfill their individual bucket lists, with comedic and poignant results.

Lead postal detective Oliver and his associate Shane have been doing a figurative dance with each other, swaying back and forth with the possibility of a relationship. Finally, on their first date at a romantic supper club, Shane begins wondering if it's a date or not, as she sees the contrast of their relationship next to the extraordinary dance performances of a couple who express the longing of her heart. As Norman and Rita work alongside each other, their personal relationship hits a bump in the road.