The past cannot be changed, or can it? Martin Teebs has tried time and again to fix the horrible mistakes he's made in the past. The beautiful Rosita Luna and his son, Martin Jr. are just out of reach, no matter what Martin tries. His lifelong pal, Billy the Kid, holds a dangerous secret that could destroy history as we know it. Against all odds, Martin finally makes it back to Lincoln, NM in 1880 but he's just days too late to reunite with Rosita and his son, who have left for Fort Sumner. The story shifts to Billy the Kid's final showdown in the tiny village on New Mexico's eastern plains. Billy, Martin, Rosita, and Pat Garrett are racing towards a date with destiny that's been coming for 3 years. Some will live through that fateful night, some will die, and all will be changed forever. Finally, the secret of Billy's mysterious grave will be revealed. Sunset in Sumner is the shocking 3rd installment of the Back to Billy saga!