Ivy seems to have her stuff together; she's got a partner and her own flat, and an idea of where life is going. But she just can't shake the memory of something she left back in her childhood home. Meanwhile, Ash is reveling in her newfound freedom after getting out of a toxic relationship, living in the moment without a care for what comes next. However, her new flat seems to have a unnerving life of its own, with walls that pulse and echo like a heartbeat.