Unhappily married art teacher Dani Oxley starts an affair with colleague Jimmy while they are supervising a school trip to an adventure centre. After leaving her students unattended to meet Jimmy in a boathouse, Dani gets back to find one of her charges is missing.

Tim is disgusted with Dani and wants her gone. At the school, a suspended Dani gathers her artwork as Sienna tries to offer some comfort, and they discuss their shared experience of foster care. Bel asks a nervous Sienna to speak at the vigil for Zac that night. Tim is confronted by Dani about the texts, but he shrugs off her questions.

Tim returns home on bail and talks to Dani about their deteriorating marriage. He also voices his fears of going to prison while his wife resolves to clear his name. Jimmy tries to smooth tension with Matt, who decides to leave and stay with his mum.

Jimmy calls Dani asking for help as Matt has run away after an argument, while Chloe shows Dani an unsettling text Zac sent her about Sienna. Dani and Jimmy track down a volatile Matt and Dani and Tim's marriage reaches a turning point as she admits she cannot stay with him.