In Season 1, Mike takes emergency measures to stop the spread of a lethal influenza outbreak, Loren blames Sully for his daughter's death and the Cooper children's father returns.
In Season 2, Mike enters a horse in a race, Loren's sister-in-law is accused of murder, a mystery man haunts the streets of Colorado Springs and Jake is blamed for a Native American's death.
In Season 3, the railway comes to Colorado Springs, Matthew inherits a herd of cattle and Mike donates her father's extensive book collection to start the town's first library.
In Season 4, Mike and Sully return from their honeymoon, the town's baseball team play for charity, Brian and Connelly feel neglected and Dorothy's book about Colorado Springs is published.
In Season 5, Sully travels to Denver in a bid to release Cloud Dancing from the army, Mike is overwhelmed by her roles as wife, mother and career woman and a famous singer falls ill.