Using the help of the charming and treacherous Damon, Elena saves her lover Stefan from the Dark Dimension. But none of the vampire brothers manages to return unharmed. Stefan, after a long imprisonment, has weakened, and he needs more blood than Elena is able to give, and Damon has been turned into a human by strange magic.

Desperate to the limit, Damon is ready to take any measures just to become a vampire again, - even go back to hell. But quite by accident, he takes Bonnie, Elena’s friend, with him. Stefan and Elena rush to rescue poor Bonnie from the Dark Dimension, while Matt and Meredith, meanwhile, protect the city from the dark forces that have descended on it.

One by one, local children find themselves at the mercy of demons. But it soon becomes clear that the true source of evil is much more dangerous and closer than one could imagine...