Just as aspiring cartoonist Tim Avery gets over his fear of parenthood with the birth of his new son Alvey, he quickly finds himself in over his head as his new baby is born with the magical Mask’s spectacular powers. Further complicating matters is the family’s jealous dog, who turns the household upside down and sparks a comical kid-versus-canine battle for control of the Mask. But unbeknownst to them all, the mischievous Norse god Loki has come looking for his Mask, and is willing to do whatever it takes to get it back.