Smith and Sim investigate when a young woman is brutally attacked in her own home by an intruder, but suspect that the attack may have been a case of mistaken identity, and that the intended victim was property developer Joanne Marsden, who has run up a substantial debt with a number of contractors that she has failed to pay for her work. Meanwhile, Hemmingway and Johannsen investigate a dispute involving a shopkeeper to appears to have sold some faulty goods. When the angry customer returns to the shop and steals goods to the value of his faulty purchase, Johannsen misjudges the situation, which ends up with two innocent children being taken and held hostage.