Roxanna has been living at the hospital in her relentless effort to aid Oliver's recovery. The bullet is starting to leak poison into his brain and must be removed. Can she convince him to go under the knife again and risk more damage to his mind and body? Fletch's security measures inadvertently put a bike courier in a Darwin bed. Jac finds a replacement for the lost vinyl from Raf's collection and lectures Fletch on the perils of snooping on Evie's phone messages. Nicky, Meena and a reluctant Frieda compare their respective Valentine's card hauls. Jason's girlfriend Greta turns up on AAU with breathing difficulties. A shocked Serena discovers the truth of her condition and expresses concern over the couple's future. Donna tries to find ways to extend Ric's recovery in order to delay his return to prison.

Jac refuses to take time off when her pain becomes unbearable, fearing it will jeopardise her supremacy on Darwin. Frieda must find an alternative solution and convince Jac to take it before she puts her patients at risk.

Roxanna believes an experimental treatment could be the answer to Oliver's recovery. With Gaskell sceptical and Serena reluctant to commit funds, Roxanna must call on a weary Hanssen for help before Oliver loses all hope. But is Hanssen ready to return?

When Sheilagh receives an unsettling diagnosis, Dominic is determined to help Lofty plan her ongoing care. But is he doing it for the right reasons, or does he still carry a torch for Lofty?