With the entire world facing a pandemic, Diana Peterson and her daughter Brooke decide to leave the city and ride out the stay at home order at their vacation home on the lake. Life is quieter there. More secluded. Safer. Or at least they thought it was. An incoming storm system immediately sends the mother and daughter into lockdown mode.

While preparing for the storm, a stranger finds his way to the door. His request? A place for him and his friends to shelter from the weather rolling in. With her daughter's health and safety in mind, Diana refuses, leaving them to fend for themselves. But some people don't take no for an answer.

As the rain, wind, and thunder rolls outside, the strangers from across the lake think they have the advantage, but they have forgotten one important rule of nature. A mother will do anything to protect her child.