After a city-saving battle leaves them mysteriously turned into kids, four masked teens are forced to hide in plain sight inside a ruthless school system, where fame turns into suspicion and a lonely classmate named Ria, the chosen Green Guardian-holds the key to their fate. But when strange metals and mind-controlled Nullshades begin attacking with growing violence, the truth behind their shrinking points to a dangerous conspiracy: a hoard of reality-bending Umbracite... and an ancient force have yet been awakened.

[a Ninjago inspired story] Someone took a rare ore, an evil villain arises, who calls himself... The Wielder. He is planning to take all elemental power! And its up to the Guardians to stop his evil plans. Get ready for exciting adventures, quests, and fights.