In the year 2030, a group of American researchers in a laboratory in Wisconsin were able to discover the gene responsible for determining the date of death in human DNA. As a result, they created an analysis that accurately determines a person's date of death. However, the effectiveness of the analysis depends on the person reaching the age of thirty. Only then are the results guaranteed. The events of the novel take place thirty years after this discovery, and it deals with the journey of four characters who were analyzed. We see the impact that knowing the date of their death has on their decisions and destinies, in an intertwined plot full of suspense and excitement, and a vision that contemplates man and immerses himself in his struggle with life and death.