During a battle with Animo, a head strong Ben in hero mode doesn't listen to reason from Max and Gwen and gets engulfed in a weird energy light. Little does Ben know that the "self destruct" function on the Omnitrix has just been initiated, sending out a signal that reaches Tetrax (the Diamondhead alien). Tetrax comes to Earth and tells Ben they must travel through space to find the watch's creator, Azmuth. He's the only entity who can stop the Omnitrix from self destructing, saving not only Ben, but the galaxies as well!