First Lady Molly has always been the only dog in the McPherson family, and she likes it that way, but all of that is about to change. When Mr. and Mrs. McPherson decide to foster Winston (a three-legged dog from a local animal shelter) until he can find his forever home, she isn’t quite sure how she feels about it. He seems nice enough, even though his wooden leg (prosthesis) is a bit strange, but she isn’t thrilled with the idea of sharing her family with another dog or giving up her special place at the family dinner table, even for a little while.
As they work together to comfort a scared little boy and have fun together at a nursing home, where they meet Biff the therapy dog, she starts to realize that it’s sort of nice to have him around. If only the McPhersons weren’t just his foster family, if only they would adopt him instead, she would always have a brother to share her adventures with! Maybe (just maybe), it could be Molly & Winston … forever!