When Marisol's insults become harsher than ever, Mo's self-esteem reaches an all time low. Tristan and Maya bond while working on a history project, and Tori tries to sabotage their new friendship.

Mo refuses to leave the house, and Marisol's attempt to help only makes things worse. Katie won't graduate unless she improves her math grade, so she hires K.C. as a tutor. When he starts spending lots of time at the Matlin's, Katie develops feelings for him -- but so does Maya.