Miserable astronaut dad Ray Coffin and evil robot jerk Dr.Phil Prometheus have fallen down the Prometheus Pit into the Microverse -- a journey which has been fatal to everyone who's ever attempted it before! Steve, the Micronauts and Muffin have rescued Bug and are now running for their lives through the halls of H.E.L.L. to escape Prometheus' cyborg security force! And Biotron is back in the Coffin's garage, trying to repair the Endeavor and not get killed by the Coffin's pet cat! It's action-packed!