In the block of flats at 12 Sernikova Street, the usual rules prevailed: you don't put your washing out of the window, you don't feed the pigeons, and you only ride the lift on even days of the week. On that Friday evening, however, everything came to a head. Peter was just finishing his exquisite dinner of three slices of bread and peanut butter. His sister Lena, meanwhile, was experimenting with the blender, trying to create a smoothie of kiwi, spinach and.... sausages. When the blender emitted a suspicious hiss and began to smoke, Lena ran to Peter with an exclamation: - He wants to explode on my nose! Peter snorted with laughter and threw a piece of peanut in her direction. - 'Your invention probably already belongs to another dimension,' he sneered. Just then a strange rumbling sound came from the kitchen. They both looked at each other. The sound repeated itself, as if someone was trying to break through the spice cabinet. With a stranglehold on their shoulders, they approached the kitchen, where they found that the the cupboard under the sink was slightly ajar, although it had been closed a moment ago. Peter lifted the lid, and a tiny paw with mayonnaise on his finger slid out from inside. Immediately afterwards, with a clatter worthy of the worst horror films, a .... a little sandwich man. His torso was a wheat bun, his legs were made of grissini sticks and his eyes were made of sultanas. - Hi, I'm Baguetto! - he said cheerfully. - Do you have anything to drink? It's awfully dry in here! Piotr was stunned, Lena only choked out - er.... - and it was then that other figures started to emerge from behind the cupboard: The Jam Sandwich, Mr Cheeseburger and even the dodgy Salami Triangle. The kitchen was filled with sandwich-wielding newcomers in seconds. They were all chattering at the same time, someone was singing a hymn in honour of yellow cheese, and Baguetto was spilling a ketchup puddle across the table. Peter and Lena didn't know if it was a dream or the result of a too-late dinner, but the situation was getting out of hand. Suddenly, from the depths of the cupboard, a muffled, excited whisper came to them: - Don't let him find the Mustard Key.... The siblings froze when, at the same moment, Mr Serdelkowy stopped, staring at them intensely. The whole kitchen fell silent...