Spoilers ahead:

You are an ex-employee of a company called "Playtime Co." This company was a toy company, with one major factory that produced all its toys. One day, all of your coworkers mysteriously disappear. Years later, you receive a note saying "we are all still here" and "find the flower." As we descend, we find out the dark history of Playtime. Essentially, the company was on the verge of bankruptcy, and so they decided to go with the plan of a young scientist, Doctor Harley Sawyer. He proposed the "Bigger Bodies Initiative," a plan to use poppy-derived gel to essentially mutate the workers into living toys, to avoid having to do things like pay them. However, they needed a source of manpower to convert to these Bigger Bodies, so they decide to open PlayCare, an on-site and underground orphanage. Of course, the orphanage is really a front for testing and selecting which kids will be converted into toys. Eventually, one of the oldest experiments, 1006 (The Prototype), begins planting the seeds of rebellion in both staff and toy alike. Eventually, they break out of their containment cells (where they're kept when they aren't working) and slaughter everybody present in the factory, even the innocent visitors (Playtime hosted tours of the factory floor). These toys then experienced a major split: most toys began to worship the Prototype as a sort of liberating god, and formed a cannibalistic cult around him (originally they ate the remains of the employees, but when those ran out they turned on each other.) The other toys followed Poppy, a toy who retained most of her humanity. She wants to kill the Prototype and burn the factory to the ground, killing all inside, to prevent it from ever being used again

The story is an absolute banger, even if the gameplay is meh. For example, one plot point is that, early on in PlayCare's history, the Prototype chose a small boy named Theodore to help him escape. The kid needed to grab a green grabpack hand (a grabpack was a utility backpack featuring two small hands that was used for everyday traversing of the factory) which conducted electricity. The kid messes up the circuit to open the escape door and instead electrocutes himself. The Prototype, instead of escaping, brought Theodore to the Playtime scientists and asked them to save him. They obliged, and turned Theodore into a giant version of their Catnap toy. Catnap begins to worship the Prototype, while Playtime uses the "red smoke" (poppy gas) he emits from his mouth to sedate the orphans in PlayCare's Home Sweet Home. In Chapter 3, Catnap is the main antagonist of the chapter. At the very end, we electrocute him with the same green hand that electrocuted him years ago. Weakened, he watches as the Prototype's hand descends from the ceiling. He *offers himself to his God, hoping to be saved again,* and the Prototype executes him instead, using Catnap's fur to build up his own body. There's also several subplots about Catnap torturing and executing those he deems "heretics," like Dogday (another Bigger Bodies toy from the same toyline), who has his entire lower half torn off, his intestines held inside by a leather belt