Donna Martin returns to Beverly Hills and pays a visit to her sister-in-law Kelly to talk about her life, while Kelly's relationship with her half-sister, Erin, becomes more strained over Kelly's over-protectiveness in her efforts for Erin Silver's mental recovery. Meanwhile, Dixon locates his biological mother and ask Annie's help to travel with him to Arizona to meet with her during Spring Break. Also, Naomi's infatuation with Liam intensifies when she goes on field trip with the class on Ryan's Habitat for Humanity house-building project while Ethan, wanting a change, becomes more acquainted with Liam who encourages him to embrace his own dark side.