As an unexpected typhoon bears down on a small tropical island, a group of students trapped at school find themselves forced to put aside their personal issues and work together. Not only to save themselves, but possibly the lives of everyone on the planet!

Shoyo Hinata joins Karasuno High's volleyball club to be like his idol, a former Karasuno player known as the 'Little Giant'. But Hinata soon learns that he must team up with his middle school nemesis, Tobio Kageyama. Their clashing styles form a surprising weapon, but can their newfound teamwork defeat their rival Nekoma High in the highly anticipated 'Dumpster Battle', the long awaited ultimate showdown between two opposing underdog teams?