Tracker is the story of Daggon, an alien life form who lands on Earth from the planet Cirron in a bid to capture 218 prisoners who had escaped from the planet SAR TOP. He lands in an abandoned field in the outskirts of Chicago where he takes on the form of an underwear model, Cole, who he sees on a billboard. He later meets Mel Porter, a Chicago bar owner who has an outgoing British half sister, Jess, who runs the bar.

A brilliant scientist named ZIN engineers the jailbreak from SAR-TOP prison, located a hundred light years away from
Earth. Zin creates a wormhole, which allows almost
spontaneous travel from the Migar solar system to
ours. The wormhole ends in Chicago, where Zin
and the escapees have taken over the bodies
of human beings and blended into society.
Cole must find the fugitives and stop them
before they can carry out their plans.

Tracker ran for 22 episodes and in addition
there was a film produced from an
episode compilation.