Plot summary
The Hollow has poisoned and imprisoned Elijah. Hayley raises the alarm that Elijah is missing, and Klaus confronts Marcel. Freya continues to woo Keelin, who promises to stand by her side. Freya, Klaus, Marcel, Vincent and Hayley meet to make plans to finish the Hollow. Vincent's plan requires Elijah's death, which angers Klaus. Freya and Vincent search for a loophole. The Hollow reveals to Elijah that only Hope has the power to truly destroy her. Klaus offers himself as a sacrifice in Elijah's place, causing Vincent to tell him that Camille would be proud of him.
Marcel offers the jawbone to the Hollow in exchange for Sofya. Vincent's spell and Klaus' sacrifice goes awry when the Hollow's acolytes intervene. Freya and Hayley attempt to rescue Elijah while the Hollow leaves Sofya before attacking Marcel. Elijah is killed, giving the Hollow the power it requires to be reborn. Vincent encourages the witches to leave New Orleans until he tells them it is safe to return. Hope and Freya search for Elijah in the broken pendant. Vincent requests his dark magic journal back from Marcel, putting his life at risk. Channeling the power of the death of Elijah and his sireline, the Hollow is resurrected in physical form as Inadu.
Credits
Adapted from Wikipedia contributors, The Originals season 4. HTML formatting and reference markers removed.