When Hounder is an infant, her entire race, the Starpeople, who have protected the earth for millennia, gets wiped out. As the sole surviver, it's up to Hounder to carry out her people's purpose.
Once defeated, Garmadon had left the Ninja with an Ominous Warning, "Something is coming." Unfortunately, it seems that he wasn't lying. A Darkness is consuming all of Ninjago. It seems the city's only hope is once again the fearless team of Ninja. But this time, will they be able to save Ninjago?