It's New Year's Eve in 2005 and your girlfriend had the craziest idea. You and your girlfriend Masha (including three other friends) are exploring a labyrinth-like network of tunnels that consists of a network of basements, bunkers, drainage tunnels and storm drains as well as natural caves. And it's all underneath Ukraine.

Masha: "Let's split up, you guys go that way while me and Y/N go this way."

Eugene: "Okay."