When you get married, you're not just getting a husband or wife-you get the family, the friends, even the exes. Buzzy and Katy are newlyweds. Katy's meddlesome sister Marcia has been married to Buzzy's friend Max for 18 years. As Marcia and Max's marriage is crumbling under the weight of life together as empty-nesters, Buzzy and Katy's honeymoon period is upended when Buzzy's wild-child baby sister shows up at the couple's TriBeCa apartment with more than a little baggage.