Rescued by tomb looter Miguel Zamora, Sonrisa Lyons struggles between her contempt for Miguel's thievery and her need for his help in returning to civilization. Miguel, haunted by the loss of his wife and son, would like to abandon the troublesome trouser-wearing woman from the future, but his cultured upbringing and compassionate heart rule. Forced companionship on the trail through Yucatan's steamy jungle blazes into mutual passion, and in spite of herself, Sonrisa is drawn into Miguel's true mission. At journey's end, she finds a possible way to return to her time. Will she try to open the portal or choose life with Miguel?