IRIS Spin-Off about a new agency, called the National Anti-Terror Service (NTS), as they go up against another secret terrorist organization, called Athena.IRIS Spin-Off about a new agency, called the National Anti-Terror Service (NTS), as they go up against another secret terrorist organization, called Athena.IRIS Spin-Off about a new agency, called the National Anti-Terror Service (NTS), as they go up against another secret terrorist organization, called Athena.