In the season premiere, Damon is forced to navigate his new reality without the love of his life. Stefan takes an active role in protecting the town from Lily (ANNIE WERSCHING).
As Sheriff Lucilia Cable unsuccessfully searches for Alec, Abby theorizes it was more than an accident and retrieves his video journals from Daniel Cassidy.
Driven to cure the worsening epidemic in Marais, Abby searches Alec's lab for a cure when her friend, Harlan, becomes stricken with the "green flu".
Swamp Thing senses a growing darkness within the swamp and starts to understand his role in the struggle for balance between growth and decay.
Haunted by the ghost of her childhood friend who re-emerges from the swamp, Abby is forced to confront both her past with the Sunderlands and the dark forces at play in Marais.