A nebbish high school senior and his best friends embarks on a road trip to attend the greatest music festival of the year in a last-ditch effort to win over the girl of his dreams.

In a moment of desperation, Ruby Chase makes a vow of servitude to a monster (Frank). She breaks her vow by committing suicide, setting Frank on a course of bloody revenge against the people she loved the most.

Ryan Walker mysteriously awakens MECH-X4, a giant robot built to defend Bay City against impending doom. When monsters begin to descend, Ryan recruits his two best friends and his brother to help pilot the robot that is their only hope of saving their town from mass destruction.