The series takes place far in the future. 400 years ago, an asteroid was spotted that was on a collision course for Earth. With no hope of stopping it, mankind split up into two groups, those that took to space and lived on an orbiting station, and those that burrowed underground. 300 years after the asteroid destroyed most life on the planet, the humans come back to reclaim their world. The Shioru emerged from the ground, and the Dodias returned from space. But they find out that there is a new life form now controling Earth, the Siliconians. These large monstrous creatures that feed on people and are immune from standard weapons and very hard to kill.

To fight this menace, the Dodias leaders created the Geisters, an elite fighting force specifically trained to fight the Siliconians. This is the story of the second generation of Geisters, lead by Dean Honos. Promoted after their previous leader was killed in action, Dean is young and inexperienced, but has the potential to be a great leader. He leads his team to the best of his ability, but there are problems. The Dodias ruling council is using the Geisters as pawns in a political game. Some members want to wage war on the Shioru, others want to wipe out the Siliconians, and the leader of the scientific branch wants to develop a form of bioarmor that was previously abandoned because of its dangerous side effects. If that wasn't enough of a problem, the Geisters have been assigned a new member, Shai Tanna, a lone wolf who doesn't get along with the others for many reasons, not the least of which is because she is a Shioru.

To add to Honos' problems, he's been given a suit of very powerful bioarmor that is effective against the Siliconians, but is causing him to have strange dreams and to be constantly tired. It also seems that one of his unit is a spy, working for parties unknown.

This is a pretty good series. It has a good mix of action and intrigue, so it should appeal to a wide range of ages. Most of the real violence happens off screen, making it suitable for preteens to view it. Every episode has an action sequence to keep things moving along, but there is also a good amount of mysterious happenings and political maneuvering that makes the show interesting for older viewers. Everyone in the political arena has their own agenda, and you aren't sure who what motivates some people, and who should be trusted. Is the mysterious girl who spends time with a certain Geister a spy? What about the science officer? Why is she pushing this bioarmor so much? Is it for the good of her race, or does she have ulterior motives? There are a lot of questions that are not answered in this first volume.

On the production side, the animation is not the greatest, but it suits the subject matter. Made in 2001, the 3D animation looks very good, but it doesn't mesh with 2D shots very well. The CGI scenes of the attack plane taking off and flying are great, as are the Siliconians, but when these images have to interact with more traditional 2D animation, the difference is striking. It's not so bad that it ruins your enjoyment of the show, but it is very noticeable, which is too bad. Aside from that one critique, this is an interesting and enjoyable show.