Greg's insistence on doing the family's taxes prompts Katie to take matters into her own hands; Oliver and Anna-Kat join forces in an attempt to win a popular radio contest; Taylor finally sees Pierce's true colors.
Katie strives to keep her long-separated parents apart when her father arrives in time to surprise the family for Christmas; Anna-Kat tries to help Trip win Taylor back.
Greg enlists Oliver and Anna-Kat's help to drum up new recruits for the Westport Historical Guild; Katie does her best to support Taylor's dreams of becoming the next "American Idol."
Katie gets upset after discovering that the PIN code the Otto family uses for everything spells out Greg's ex-girlfriend's name; Katie retaliates by dragging out gifts from former boyfriends; Taylor and Trip argue over her relationship with Pierce.