Y/n was in a zombie apocalypse with her usual trio from childhood her tall, burly blonde friend Casey and her tall, burly brunette friend Damien who considered her their boss of sorts they had been surviving for a year since the apocalypse began in a huge reinforced treehouse with a mote of spikes around it with a functioning drawbridge. One night after a late grocery run with the trio they hear shouting and see a man in his mid 20’s (Spencer Reid), a man in his mid 30’s (Derek Morgan) and a woman in her mid 30’s (Penelope Garcia).