Marcus is reeling after his breakup with Shea, and Will and Fiona have opposing theories and methods of how to help him get over his first great heartbreak. It all comes to a head at the dance where Marcus very publically tries to win Shea back. And Liz, frustrated with Will's attachment to Fiona and Marcus, finally breaks up with Will. Will blames Fiona for everything. And after a huge argument Will and Fiona end up kissing. (thetvdb.com)