Swap takes us to the internal conflict of a young father, torn between solving a crime and committing another crime when one day his only son is kidnapped and the criminals demand him to steal another kid in exchange of his son's life.

Buenos Aires. Exe, 25 years old, has just lost his job and is not looking for another one. His neighbors and friends seem as odd to him as they always do. Online, he meets Alf, a boy from Mozambique who is also bored with his job and who is about to follow Archie, another boy who has run away into the jungle. Through the dense vegetation of the forest, Archie tracks ants back to their nest. One of them wanders off course and comes across Canh, a Filipino, sitting on top of a giant heap of earth and who is about to go back to his strange, beautiful home town, where he too has a miserable job.

A fashion designer hires a nanny from the Philippines to assist her in caring for her family while she is suffering from what she believes is a tick-related illness. The nanny uses traditional Filipino folk healing techniques to help her, but in the process of doing so, she uncovers a horrifying truth about why she is there and why her employer is actually sick.