Ok. Spoiler time.
All the patrons in the room are snobby food critics except for the girl speaking- she is there by accident.
The chef blames these critics for ruining the restaurant industry and making his job miserable, so now he's snapped and is holding them all hostage.
The girl finds the chef's old photos and realizes that before he was famous, he was just a normal burger shack employee who loved making food for people.
She orders a cheap greasy burger on purpose, to remind him of the time when he actually enjoyed cooking.
Her plan works, the chef enjoys cooking her food.
She asks for a takeout box for her leftovers, so he gives her one and decides to release her.
He still kills all the other patrons in the room and burns the building down, leaving her the only survivor.
English
