The anime originally aired in Japan from April to July 2011, produced by Studio Manglobe .

The dub famously premiered in the United States on May 26, 2012, as a cornerstone of Adult Swim’s newly revived Toonami block .

The story follows , a middle school student who is the sole survivor of a brutal massacre that wipes out his entire class. Wrongfully convicted for the murders by a mysterious "Red Man," Ganta is sentenced to Deadman Wonderland , a privately owned "prison amusement park". The Cautionary Tale of Deadman Wonderland

Due to its intense violence and language, it was rated TV-MA for its broadcast run. Plot Synopsis