Captain Stupendous is having a bad... life. His ex-wife, Mrs. Mind, is marrying a mortal. His eldest son, Kid Liberty, is struggling with his sexual identity. His daughter, Tesla Curl, can’t get a date to the prom. And, his mortal middle child... what’s-his-name... is, well, mortal. Over the course of a very long day and a half, Captain Stupendous attempts to fix his daughter’s problems, work out things with the son he cares about, and do whatever he can to prevent Mrs. Mind (soon to be Mrs. Mind-Meriweather) from being happy without him.