Blair and his cousin embark on an adventurous day out, snorkelling on the wreck of the Omeo, but their excitement turns to panic when Blair loses his brother' s cherished GoPro camera on the seabed. No one knows about his mistake except his cousin, and she urges Blair to keep it a secret. But Blair' s lies quickly spiral out of control. Terrified to confess but wracked with guilt, Blair is left floundering in the deep.