The Liar Next Door by Nicola Marsh begins with Francesca, aka Frankie, and her perfect life. At the outset, her life with her husband, Andre, daughter, Luna, and her successful vlog career appears perfect. Once the audience manages to peek through the many layers of perfection, at the core, none of it is perfect. Andre had cheated on her, and although she took him back, in her heart, she is unable to trust him completely. With that suspicion lurking inside, the cost of keeping a flawless front for the world is taking a toll on her. Unaware of her internal conflicts and turmoil, her new neighbor, a single mother named Celeste, envies Frankie for her lifestyle. For the sake of her daughter, however, she attempts to bond with Frankie. It’s crucial for her that her daughter, Vi, forms a connection with Luna. Nevertheless, when Frankie learns about Celeste’s dark past, she finds herself conflicted about allowing this friendship to blossom. Unbeknownst to both of them, another scandal is on the brink of revealing itself. Their neighbor, Saylor, both married and pregnant, is finding herself in a very peculiar situation. As much as she loves her husband, she cannot deny the strong feelings she has for one of her neighbors. One thing is common amongst them all: none of them seem to trust Celeste completely.