While shopping, you experience a sudden heartache, and those around you also collapse. You kneel to alleviate the pain, but it's not an isolated incident; a wave of heart attacks strikes the entire city. As chaos ensues, you discover that over 500 vampires, armed with katanas and superhuman strength, have invaded the town. They're mercilessly slaughtering everyone, including children whom they kidnap to convert into vampires, while the city burns in the background.