Personal trainer Nick Cavatelli (guest star Aaron Hill) and nutritionist Summer Whelen (guest star Wynn Everett) trade lingering glances across the free weights and smoothie station at the gym, but Summer's too shy to share her feelings for Nick. Grace (Jaime Murray) hires them both to work on her fitness regimen in the mansion, but things get complicated when Kate (Christine Lakin) reveals that she and Nick have a past together. Meanwhile, Ari (Greg Ellis) implores Danny (Kristoffer Polaha) to find his love gun, fearing for the safety of the family. Danny and Kate go in search of Grace's secret safe, but when Grace catches them, she refuses to believe Danny's motives are anything other than selfish.