As Marco and Keith prepare for their wedding with the help of wedding planner Olivia, Megan discovers that her father Arthur is drinking again. Megan and Lily lovingly tell their father how worried they are; unaware that he has received a letter from their mother asking him let her explain in person why she left. Sage is upset when Rose reveals she plans to go on a wilderness trip over Spring Break, rather than going with Sage on their annual spa vacation. Zach worries that Rose is changing and won't be interested in him much longer. Sage is shocked when Luis tells her he doesn't believe in gay marriage and refuses to attend Marco's wedding. Megan gives Laurel the first draft of Laurel's biography and is relieved when Laurel loves it. Megan and Will have a fight where all of their pent up issues come out, and they decide to break up. Attending the wedding alone, Megan meets Simon, a college friend of Keith's, and is unsure what to do when Will calls her the next morning to apologize.