Larkspur Nielsen is ready for a change now that her parents have passed on, and her older brother is successfully running the family business. She scuffs at the small-mindedness that runs rampant in her small Ohio community, and sees little chance of a satisfying future there. She has a little money saved up, and her turning the tables on a crooked gambler who has fleeced several locals, including her younger brother, she can stake out a new start for herself and her three sisters.
As the gambler's threats of revenge echo in her ears, she and her sisters head to Independence, Missouri, to join a wagon train bound for Oregon. Knowing that four women traveling together will bring unwanted attention, Larkspur takes on a disguise, passing herself off as Clark Nielson, accompanying his three sisters. Maintaining the ruse proves to be more challenging than Larkspur expected, as is protecting her headstrong, starry-eyed sisters from difficult circumstances and eligible young men. Will reaching their goal prove too much for them?