Having left behind his mechanical toe after his last adventure, the alien robot Hilo can use it to talk with his friends DJ and Gina. Then one day a portal appears, and out pops Hilo in pieces! He quickly reassembles and reclaims his toe, but he doesn't bring good news: Other creatures are coming through the portal. Hilo, DJ, and Gina team up to save the whole world from the likes of a giant mutant chicken, a Viking hippo, and a horde of murderous vegetables from outer space!