Sheera and Tor hear thunder during a snowstorm and discuss how thunder is said to be the voices of the Snow Trappers. Little Rok doesn't believe the stories and decides to take Ork with him on a search for the fabled monsters. Little Rok is pretending to be Mightor when he is captured by one of the monsters. Ork returns to get help and Sheera sets out to save her brother only to be captured herself. Tor turns into the real Mightor in an effort to save them both from the clutches of the Snow Trapper.