Belinda Salinger was the last sister of four to find love. She wasn't really looking and had a mind it would happen when it was supposed to. On the day her sisters all leave with their beaus, she realizes how lonely she will really be. Is she destined to spend the rest of her life running the private investigating agency the sisters' uncle left to them?

Lionel Calverson, the son of the mayor of Josephson County, very near Sacramento, arrives that very day unexpectedly. He is in need of help and heard the Wagon Wheel Justice Agency was run by professionals – even though they were all women. In 1850, that wasn't commonly accepted.

Lionel enlists Bonnie's help to solve a mystery of cattle rustling and sabotage that surrounded his best friend, Dwight Barnes. Together, they work through the clues to find out who is responsible for the crimes and clear Dwight's good name.

Despite complications and obstacles, the two diligently work together and realize at the end of their adventure that they were destined to be together.