A young botanist transfers to a tiny desert town to examine an intrusive plant varieties. While out on research, she involves the aid of a downed airplane only to find herself captured by an unskilled medicine mule who forces her to lead a trek across the sweltering desert to his decrease. A neighborhood constable is attracted into the hunt as his defiant little girl sets out to discover the missing out on botanist, all the while being pursued by a regional drug receiver.