Principal Nezu told Class 1-A, 1-B and Shinso to go with Aizawa and Vlad King to an underground lab for a schooltrip. When they arrived they got met with multiple scientists and lots of cages that had a document in a stand next to it and they had numbers on the doors like: 058, 059 etc but this cage was just a brick wall with a black door that had to be opened by a code, it said '666, High danger, enter at own risk'. In most cages were people, some where empty (please state your OC later)