The Harmons are blissfully unaware that their home, the site of nearly two dozen violent deaths, is haunted by ghosts who can (and do) appear like normal humans. One of them, Tate, becomes one of the patients Ben works with out of his home office, and and he also forges a bond with Violet. These ghosts aren't just floating spirits, though — they insert themselves into the lives of the living. Vivien has sex with a man in a latex suit, believing it to be Ben, but it's actually Tate, trying to conceive a child to give to Nora, another ghost who lost a child long ago. Instead, Vivien becomes pregnant with twins: one Ben's, one Tate's.
Vivien's isn't the only pregnancy happening around this time. Ben's ex, Hayden, reappears, claiming to be pregnant with his baby. She lies about getting an abortion and instead threatens to tell Vivien unless Ben leaves his family and raises the baby with her. Larry kills her, but Ben buries her on the house's property, which, unbeknownst to him, allows her to come back as a ghost. Nora and Hayden plot with other ghosts to drive Vivien insane so they can steal her babies.