In order to survive a summer of wedding fever, longtime single friends, Ben and Alice, agree to be each other's plus one at every wedding they've been invited to.

Two friends are off on a weekend outing. Marshall thinks the trip is to re-establish their friendship, but Sam has ulterior motives in mind as he crashes the wedding of a woman he still loves.

Evelyn and her oblivious son Ziggy seek out replacements for each other as Evelyn desperately tries to parent an unassuming teenager at her shelter, while Ziggy fumbles through his pursuit of a brilliant young woman at school.