Third grader and inventor extraordinaire Ada Lace likes nothing more than to tinker with mechanics like her robot, George. Her latest project is to fix up a ham radio, something that she could use to contact people on this planet...and beyond. The only problem is that she just can't get it to work properly.

During a sleepover, Ada's best friend Nina hears something strange coming from the radio in the middle of the night. A distant voice says, "Release the swarm!" convincing Nina that aliens are about to invade planet Earth.

Could Ada and Nina have stumbled upon something...extraterrestrial?