 Ivan finds no clues to his past at the apartment, but the two then encounter Doctor Spritz, who tells Ivan that David was his former lab partner.Spritz then beseeches Ivan to destroy something code-named "Echidna", which could kill thousands if unleashed in Del Ray.Ivan goes to his old apartment to try to find more clues, at which point he recalls that he and David were one of the scientists working on Echidna, which is revealed to be a deadly and highly contagious biological weapon.