While he is accused of the murder of his so-called father Jérémie Rowland, XIII is sent to the Plain Rock prison asylum. There, he is subjected to various experiments which are supposed to give him first memory and secundo physically determine who he is. Thus Colonel Amos, General Ben Carrington and the rest of the army discovers that XIII would eventually not Steve Rowland but rather a certain Ross Tanner, who also specialized in the close combat and he also disappeared for more than 2 years. During this time XIII decides to escape from this asylum and with the good care of the beautiful Lieutenant Jones he will undertake an exit in force.