Evie is a risk-averse quality-control assessor, who appreciates order. Then Evie meets charming, free-spirited Xavier , who encourages Evie to carpe that diem, because he believes humankind has a mere eight months and twelve days until a runaway asteroid smacks us all into stardust. That’s why he made an Apocalyst – a tally of every last thing he wants to do before the world goes kaput. So with the help of her friends, Evie must decide whether Xavier is certifiable and whether that even matters, if being with him means living her life more fully.

Evie and Xavier's relationship hits a snag when his escaped convict cousin Jesse wants to move in. As they continue to cross off adventurous Apocalyst items, Evie faces possible downsizing at work, and Xavier helps her confront her fear of failure. Meanwhile, Hank helps Timothy revamp his image in an attempt to win back Evie.

Evie is struggling with her feelings between a newly confident Timothy and a more emotionally available Xavier. Kareema takes a big step in her relationship, while Deirdre is having some doubts about her future.