On a romantic night with her new boyfriend Steve, Ackland's neighbour interrupts after revealing she has found a gun in her tenant's room. Beech is determined to set up an OBBO at her flat, but Deakin warns him off. Ackland is determined to avoid it, not just because of her past, but because she wants another night in with Steve. However, when no suitable OP is found, Ackland reluctantly agrees to let Beech and Lennox have the OBBO in her flat. The situation gets compromised when Ackland clashes with her neighbour after finding a spliff in her house, but they get back on track and arrest their suspect. When he is alibied, Beech and Lennox realise they’ve been looking at the wrong person.