"Dark Angel" follows an original storyline that takes place after the destruction of the headquarters of Manticore, an organization which creates genetically-enhanced super soldiers, at the beginning of the TV series' second season. Seattle has been placed on a curfew as the I Corporation round up the escapees from Manticore. They are particularly interested in capturing super soldier Max Guevara. Max evades and fights I Corporation through the streets of Seattle as she returns to her apartment. After battling opponents in her apartment lobby, Max learns that her friend and flatmate Original Cindy has been captured by the sector police. After defeating the police and rescuing Original Cindy, Max goes to meet her friend and ally, cyber-journalist Logan Cale at his apartment. Outside the apartment complex she defeats an I Corporation genetically engineered boss character named Beetle. Meanwhile, a cloaked figure murders a police officer at the scene and steals his vehicle. Logan informs Max that he has received an email from someone named Sylan who claims that Max has a twin sister. He traces the email to an I Corporation research lab named Tritech. Max tells Logan that Sylan was one of the child soldiers at Manticore, and that she stayed behind in order to help Max and eleven of her siblings escape. Max proceeds to Tritech to find her.