Your unconventional weapon is food! You've snuck into a five-star restaurant with the goal of shutting it down. Impersonating a chef, you'll make dishes at the request of patrons while sneaking things in that they're allergic to. Poisoning people will shut down the restaurant, but make sure to stay out of sight and pace yourself - poisoning patrons raises suspicion, but making dishes successfully without poisoning people will lower suspicion.