In a drought-stricken town, two sisters discover a hidden stream. But drinking its water comes at a price.

After weeks without rain, Milagros and Rocío stumble upon a mysterious red arch and a flowing stream. Convinced they've found their salvation, they decide to take the water home. But their grandmother orders them to return it, warning that the place they discovered will awaken an ancient curse. Now, they must decide whether to obey her and endure the drought or defy the warning and face the consequences.