Rachel Simon (MacDowell) is an in-demand New York City fashion photographer whose busy life camouflages her emotional isolation. When her father suddenly dies, Rachel comes face to face with the family problems she has tried so hard to avoid. With no one else in the family willing to take on the responsibility, Rachel is forced to spend time with Beth (O'Donnell), her endearing, feisty and developmentally disabled sister who fills her days riding city buses.

During what at first was supposed to be an obligatory exercise, the time Rachel spends with Beth becomes an awakening for her as she discovers that her sister has created a whole family for herself. From the bus drivers, in particular Rick (D.W. Moffett), whose big heart and good looks impact Rachel and her sister, as well as the regular passengers, and Beth's boyfriend, Jesse (Richard T. Jones), Rachel realizes that these people value her in a way that Rachel could never have imagined. Rachel and Beth's days together are both demanding and challenging, but, for the first time, the disparate sisters have the opportunity to really get to know one another and find a way to communicate as a family.

Watch Sunday @ 9 p.m. on CBS and WHIO-TV, Channel 7