When Sasha’s newly divorced sister-in-law, Abby, moves in temporarily, everything seems normal—at first. Abby is helpful, polite, and even fun to be around. But soon, Sasha starts to notice odd behavior. Abby begins dressing like her, using the same perfume, mimicking her phrases and laugh. At first, it seems like harmless admiration.

But then, Abby starts taking over Sasha’s routines—cooking her signature dishes, helping with school drop-offs, and even organizing Sasha’s closet better than she ever did. One night, Sasha hears her daughter accidentally call Abby “Mom.” That’s when the unease turns into alarm.

Things spiral when Sasha catches Abby reading her private journal. When confronted, Abby calmly replies, “I just want to understand how you think… how you live.” Disturbed, Sasha searches Abby’s room—and finds a hidden box filled with photos of Sasha, old college memorabilia, and affirmations like Be her. Be better. Be happy.

At the bottom lies a crumpled letter from years ago—Abby had introduced Sasha to Michael in college, but had secretly hoped to end up with him herself. Sasha unknowingly lived out the life Abby once dreamed of.

Now, Abby isn’t just imitating Sasha—she’s trying to replace her.