Devoid of curtains, the house across the street facing Alli and Jacob's apartment is a magnet for guilty glances. As a three-month private show of steamy passion keeps the entranced couple wanting more, a sudden change in the unknown lovers' lives raises more unanswered questions and unsettling uncertainties. Now, there is no turning back; Alli and Jacob must know. However, is the grass greener on the other side? Are the silent intruders prepared to face the truth and discover what's behind the neighbors' window?