Amanda is a young mother visiting from the capital city of Buenos Aires to spend her holiday in the country. She lies hospitalized with a mysterious poisoning, trying to reconstruct her memories to find the source of her illness. She is defined by her constant vigilance over her daughter, regularly calculating the "rescue distance" to ensure she can reach the child in an emergency. Unfamiliar with the rural environment, she relies on her maternal instincts while struggling to identify the hidden agricultural threats surrounding her vacation home.

Carla is a local woman who befriends Amanda and works at a neighboring farm. She distances herself from her own maternal role after her son survives a severe environmental poisoning that leaves him permanently changed. Wearing glamorous clothes and standing out from the rural town, she remains acutely aware of the toxic dangers that city visitors ignore.

David is Carla's nine-year-old son who speaks with unsettling, adult-like authority. Following a severe poisoning incident at age three, he underwent a spiritual "migration" that left him with white spots on his skin and a strange demeanor. He sits beside Amanda in the hospital, repeatedly instructing her to focus on the exact moment she encountered the source of her sickness.

Nina is Amanda's cheerful and obedient young daughter. She enjoys playing make-believe games with her mother, putting on aristocratic voices, and carrying her beloved stuffed mole. As she spends her vacation in the rural town, she plays in the grass and around old wells, trusting her mother completely while remaining vulnerable to the toxic environment.

Omar is Carla's husband and a former racehorse breeder. He once looked forward to improving his family's financial standing through his animals, but a series of tragic events costs him his horses and his livelihood. He becomes increasingly silent and isolated, locking doors at night and struggling to understand the changes in his son.

Amanda's spouse remains back in the capital city of Buenos Aires during the family vacation. He is an active participant in raising his daughter, teaching her strict safety habits. He views the rural town from the perspective of an outsider, missing the subtle signs of agricultural contamination that define the local area.

A local healer who lives near the soy fields. In a town where traditional doctors are scarce and slow to arrive, residents rely on her for emergency care. She performs mysterious spiritual migrations to treat the frequent poisonings and ailments that plague the rural farming community.