Young couple Tom (Jesse Eisenberg) and Gemma (Imogen Poots) are brought to a neighborhood called Yonder by a real estate agent. Searching for a starter home, the real estate shows them home number nine, describing it as a forever home. Unconvinced, Tom and Gemma decide to leave and search elsewhere.
However, they soon find they're stuck in an endless labyrinth of identical homes with no way of escaping. Without much else to do, the two attempt to live a normal life until they can't take the mundaneness of it anymore and attempt to burn it all down. When that fails, the couple are given a child to raise, but even the child cannot change things for them as they slowly descend into madness.