What is the main conflict in The Tree of Red Stars by Tessa Bridal?

Tessa Bridal's The Tree of Red Stars takes place during a time of dire political upheaval in Uruguay. Most of the story centers on the activities that occurred during the 1960s and 1970s in Montevideo, Uruguay's capital. Although a fictionalized account, Bridal makes a statement in the front pages of her book that the story was inspired by real people and real events.