Set in an old, quirky diner that mysteriously appears in the town every Friday night, players take on the role of a witty and sarcastic waitress named Charlie. As she serves customers who claim to be from various parallel universes, the diner is plagued with strange occurrences, from inexplicable food vanishing acts to bizarre time loops. Each customer has a unique backstory and a reason for entering the diner, but Charlie must determine whose 'hello' is genuine, which could either save the diner or trap her in an alternate reality forever. Players engage in witty conversations, collect clues, and solve outlandish riddles while trying to keep the dinner rush alive amidst the chaos of interdimensional guests.