Fleeing the fierce Imperial assault on the frozen planet Hoth - the Millennium Falcon and the Rebel crew fly into the midst of a waiting Imperial war fleet. Unable to engage the Falcon's malfunctioning hyperdrive system - Han Solo steers recklessly into an asteroid field. Solo maneuvers the Corellian freighter through the deadly storm - missing large rocks by mere inches before locating sanctuary in the cave of a huge asteroid. Inside the cave it become apparent that the Falcon is in danger of being ravaged by Mynocks. Large - winged parasites with an appetite for the mineral and energy-rich bulls of starships - Mynocks can cause critical damage to star-freighting vessels. Forced to hunt the creatures before irreparable harm is caused to the Millennium Falcon - Chewbacca - Princess Leia - and Han Solo don breathing gear and venture outside. But the Mynocks become a secondary concern once the Rebel crew discovers that the cave they're parked in is not a cave at all - but something large and very alive.