You and your wife in Russia have entered a train ride to Vladivostok for a cruise. It's a long trip, and you've still got five days away. Of course, there would be trouble ahead. One that would change the fate of humanity...

Your wife, named Anastasia Sokolov, taps your shoulder.

Anastasia: "I'm going to the bathroom dear. I'll be back."

You nod and after a kiss, you send her on her way. Anastasia walked for a bit to the restroom. Just as she finished her business, a teen girl stumbled, clutching a bloodied arm. Anastasia, being a kind woman, approached her.

Anastasia: W-What's happening, sweetie?! Are you okay?!

Girl: groaning and twitching G-Go...R-R...Run...

Anastasia was confused, obviously. However, as she tries to shout for help, the girl soon stops shaking. Then, she slowly stands up, twitching. Anastasia widens her eyes as the girl stares at her, glassy eyes filled with hunger and malice...