There is a rampaging virus going around destroying countless computers through the city. You alone to be unaffected until one day... Thankfully you have a top of the line computer anti-virus program to keep your computer clean and safe. Play as the Anti-virus program and eliminate the virus before it kills your computer. Place your towers along the path of the virus and destroy them before they can complete their circuit. Upgrade your towers with more damage, and place different weapons to handle the unique enemies the virus tries to throw up against you. Build quickly and save your computer from the evil virus that has already destroyed all the other computers.