Shirley Partridge receives a call from the school principal, George Clauson, asking her if she and her family are identified with women's liberation. There is a poster in school saying that they will sing at a rally for POW, Power of Women.
Shirley tries to find out which member of her family committed them to this appearance. She learns that it is Keith – his new girlfriend Tina Newcomb is very involved in the movement and has taken Keith's maybe for a definite yes.
Shirley has to confront angry, hostile parents who are called "Morality Watchdogs." She tries to keep calm in the face of their threats, but she finally blows up and says that her family will definitely appear at the rally.
Keith invites Tina to dinner so that his family can finally meet her and they are shocked with what she has to say on the subject of women's lib. Keith is annoyed and when he takes her home, he refuses to walk her to the door or even kiss her. He tells her that if she wants equality, she can have it.
On the day of the rally, Tina tells Keith that the family has to sing her songs, not their own. This is the last straw for Keith who gets very angry and storms off the stage. Shirley stops him and tell shim that they promised they would sing – and they will!
The Partridges sing their song, "I Think I Love You," much to the dismay of Tina. The "Watchdogs" at first don't like it, but then they start to enjoy the music. The kids get into the beat and love it. When Tina sees the crowd's reaction, her anger begins to fade.
After surviving this ordeal, the family is horrified to hear that Danny has committed them to perform for the "Morality Watchdogs."