Summer is a time to relax, unwind, take a vacation, and be free. But 17 year old Daniel Austin gets none of that because his obsessive online stalking of his classmate and crush, Mona Wilson, got him put on house arrest for the whole summer. So, no cell phone, no Internet, no leaving the property, and especially no Mona. Then Daniel's single mother has to go on a long business trip, and Daniel has the place to himself.

Daniel figures out a way to piggyback onto his neighbors' wireless signal and believing he's surfing off the grid, uses his time to check in on his friends - and Mona... But what Daniel didn't expect is for Mona to check up on him. And what she does next shakes him to his very core.

And then things start to happen. Daniel receives mysterious packages in the mail, hears phantom noises, sees inanimate objects move, and feels a strange presence in the house...