Mark “Boots” Foster is a Life Flight Nurse who also works in Mercy's ED. He flies on the airship, Pegasus, out of Lubbock, Texas. Dr. Elizabeth Smith, a recent graduate of medical school, is hired not only to work in the Emergency Department of Mercy, but to fly onboard with the life flight crew.

A power struggle ensues, with Boots, who ran the ED well for the past 4 years, and Dr. Smith, who feels the entitlement of her position as a physician. Both people are strong willed, stubborn, opinionated and brash. In essence, they are cut from the same cloth. Tension runs high when Dr. Smith and Boots work together, either in the ED or in the air.

The couple is so different when viewing life. Dr. Smith sees the world with hope and compassion. It is evident with the work she performs, both with the living and the dying. She believes, “If there’s a life, there is hope.”

Boots sees the world in a practical matter. Death does not faze him. When asked if he was afraid of dying, Boots replied, "Not without a fight. I am not afraid."

And yet, both are survivors of life and what that life has brought to them. Both hold deep dark secrets that will change their worlds forever.