On her 5th anniversary, Diana Sterling catches her spouse Colin Vance and the nanny Gemma Bates having an affair. She learns they stole her assets and plan to frame her for abuse. They even stage a fake suicide attempt, harming adopted daughter Lily Sterling and coaxing biological son Finn Sterling to frame Diana. Diana calmly installs cameras to gather proof. When Finn Sterling suddenly needs a bone-marrow transplant, a DNA test reveals Diana isn't his mother. Gemma Bates admits Finn is her love child with Colin. Later, Gemma's ex-husband demands copper coin to be a donor. While resolving this, Diana discovers Lily Sterling is actually her biological daughter. Diana ultimately gathers enough evidence to send Gemma Bates to prison, while Colin Vance's crimes are also exposed, landing him in jail.
