Canaan is an anime television series, conceptualized by Type-Moon co-founders Kinoko Nasu and Takashi Takeuchi, based on the scenario that they created for the Nintendo Wii visual novel 428: Fūsasareta Shibuya de, which is noted for being one of the few games to be have been awarded a perfect score by games publication Famitsu.
Plot Summary: Two years ago, Shibuya was ravaged by a biological terrorist attack using the deadly Ua virus. Maria Osawa was saved when her father inoculated her against the virus, but is left with partial amnesia from the shock. Now working as a cameraman, she reunited with her friend Canaan in Hong Kong. Canaan is an assassin gifted with synesthesia, and she's being targeted by the terrorist squad Snake. Meanwhile, numerous groups converge on Hong Kong, all after either Canaan or Maria.
(source: Wikipedia, ANN)