As Hurricane Elmer hits, Judy, Stink, and the entire Moody clan hunker down and ride out the storm, but when the power goes out, Grandma Lou proposes some activities to pass the time in the dark.

"Look up! Look out! A comet is coming, a comet is coming! Stink is camped out in the backyard with his sister, Judy, and he can't wait to lay eyes on P/2015 OZ4, also known as the Sherman-Holm Comet. But then news of an asteroid hitting Russia reaches Stink, and suddenly he's feeling squeamish (and squash-ish) about close encounters of the outer-space kind. Will donning an aluminum-foil cape and building a bunker in the basement help keep him safe?...