Welcome to the Ark in the year 2045, a massive floating city in a remote area of the Pacific Ocean and the last hope for humanity's survival. Built by scientists in the early years of the 21st century as a completely self-sufficient habitat, the Ark has been overrun with tens of thousands of refugees fleeing the rapid rise of the Earth's oceans thanks to the effects of global warming.
As the oceans continue to rise, less people arrive on the island until eventually those on board lose all contact with the world outside, leading them to believe that the city is all that remains of mankind. Now, overwhelmed by thousands of refugees, the Ark's renewable resources are dwindling and, with the balance of power about to unravel, two factions emerge.
The first is the Ark's Security, police officers charged with maintaining law and order amongst the remnants of humanity. The second is the Resistance, a band of militants that want to use the Ark's resources to leave the city in search of life. The only question that remains is this: which side will you choose?