When Gabriel's immigrant mother returns to her native Uruguay, he takes a break from his uninspiring job to accompany her. Immersed in his squabbling family, birdwatching in the wetlands on their abandoned ranch, and falling in love with a local biologist, he makes discoveries that force him to contend with the environmental cataclysm of his turn–of–millennium present—even as he confronts the Cold War–era ideologies and political violence that have shaped his family's past.