"Heritage" follows Detective Annabelle Lakeman as she tries combining her troubled marriage, her disconnected family and two eerily similar suicide cases as it takes her and her partner Joan everything to prove that it wasn't a suicide but a series of well-planned murders. As time goes on, the link to Annabelle's life becomes undeniable. Haunted by her past, Annabelle is drawn into a twisted game of cat and mouse with a killer who seems to know her darkest secrets. With no way to hide and always one step behind, Annabelle realises she's not just hunting the killer but fighting to protect her family and herself from becoming his next victims. Driven by her demons and fuelled by a relentless determination to seek justice, Annabelle risks everything to bring the case to a close. Echoes of the past may never truly be silenced. Can she find out who is behind the relentless murders of innocent victims before she loses everything she has?