The five MacKay brothers--Ethan, Evan, Dylan, Aiden, and Aaron--run Sweet Grass Ranch, a South Dakota cattle ranch in the foothills of the Black Hills Mountains, after the untimely death of their father.
Navy SEAL Ethan, is home now, managing the ranch with his twin brother, Evan. Ethan and Evan are the oldest of the brothers.
Dylan (Finn's Lawman, Rock Creek Ranch), a deputy Sheriff for Meade County, is the middle brother. He also helps out on the ranch in spare time.
Aiden and Aaron, the youngest set of twins, run a rodeo stock business associated with the ranch. Both are former bull riders.
Connie MacKay (Leaving Noah, Rock Creek Ranch) is the boys' mother. Their young sister, Sarah (Protecting Sarah, Branded Filly Ranch), is a country music singer.