Calder decides to stay on and investigate the previous night'sdiscovery. Tosh welcomes her support as the revelation of atattoo sends the case in a sinister new direction.When amysterious tribute is left at the crime scene, Tosh and Calderare drawn to the house of Tom Knox, a nervous and reclusivefigure whose family have a longstanding feud with the Bains.Tom is guarded about his relationship with Ellen and thedetectives grow suspicious.Elsewhere, Sandy visits a mentalhealth facility where Ellen stayed briefly before moving toLondon. He discovers that she was admitted by her cousinHeather and looked after by Dr Azir Sadat. Both blame Ellen'sbreakdown on her hard partying lifestyle but it becomes clearthat there are hidden layers to Heather and Azir'srelationship.Tosh receives a shocking call from Cora at themortuary with a horrifying development, while Calder's pastand present collide when she hears a startling revelation abouther father.As Calder and Tosh race to prevent disaster, theyare drawn to a horrifying fire on a remote hillside and a brandnew prime suspect in this increasingly complex and unnervingcase.
