Paul is shocked to hear from his estranged mother who wants to visit for Rainbow's 13th birthday and soon learns more about why she abandoned him. Meanwhile, Rainbow sees turning 13 as a huge turning point in her life and wants a big birthday party, but Alicia wants to celebrate all the things Rainbow missed out on over the years while on the commune.

Alicia gets a bonus after winning a big case and wants to buy a nice car, but having been raised on the "fifty-cent principal," Denise wants her to buy two cars in lesser condition so she can have one. Meanwhile, Paul tries to teach Rainbow, Johan and Santamonica about the value of money.