Underneath the bloodstained pile of hacked up stringy creature-things is an epic tale, maybe. According to Square Enix, Nier is their next great story.
The story so far is, Nier is searching for a cure to save his daughter who caught the deadly Black Scrawl virus. Kaine is a demon possessed swords-futanari who travels with Nier. Her motives and why she loves to swear are unclear. There’s a magical flying book called Grimoire Weiss that follows Nier and powers him up too.
Yosuke Saito, the producer of Drakengard and Radiata Stories, is Nier’s producer. In a past interview, Saito said the theme of Nier is “love”. Perhaps, love for Nier’s daughter or sister in Nier Replicant. But, hey nothing is what it seems in Nier so “love” may represent Nier’s love for killing things.