You can glean the whole plot from the synopsis and the fine reviews posted here.
So I'll _try_ to add something a bit different.
As soon as the movie opens, we get right into the core of the concept. And *Kudos* to the director and screen writer for not dithering about with useless filler, meaningless " romance" and boring back stories.
Our protagonist stumbles upon some kind of vintage 1950's technological device in an old neighbors' garage. This oddly beautiful device has a _very_ cool Steampunk aesthetic- old toggle switches, heat sinks, VU meters and old radio tubes. Ostensibly, it appears to be a radar-like device. It's purpose is unclear- but not for long!
On the work table in front of the device, there's a very authentic, old-timey NASA tech manual with well worn, yellowed pages. NASA? Oh, I love this already. These are important little details because they enhance the visual aesthetic, provide a time frame for when the device was built and most importantly, what the machine does. It's a *Ghost Finder!* and it works! NASA tech and Ghosts? I love it!
Naturally, these kids being computer tech whizzes, turn this device into an APP for their phones... Don't ask. They simply did it. Go along with it.
*Cool, techy supernatural mayhem ensues.*
I was not disappointed, as I loved the concept and how well they produced a quality film on a shoe string budget. Terrific young actors. Dramatic and moody scene illumination. Tight dialogue.
What's not to love?