No! I think, as I watch it fall in slow motion. Immediately, my thoughts go to Vanessa, who pulls a piece of plastic out of the reef on every dive. I may have brought toxic sunscreen but I’m not going to let a piece of plastic float about the Great Barrier Reef if I can help it. I can see the cup perfectly clearly, bobbing in the moonlight. Before I know it, I’ve stripped off my sweatshirt, and I haul myself over the railing and into the ocean.

Only once I’ve slammed into the cold water do I realise what I’ve done is incredibly stupid. There could be any number of sharks lurking under my feet.

‘Millie!’ Pippa shouts.

I locate the cup in seconds, the water is still, and I hear Aaron ask Pippa what’s going on. He shouts at me to get to the back of the boat, where there’s a ladder, and Pippa scurries to bring me a towel.

‘What were you thinking?’ Aaron asks, as I pull myself out of the water. ‘You know you can’t launch yourself into the water in the middle of the night.’ My teeth start to chatter. ‘She dropped pla-a-stic,’ I stutter out, holding up the waterlogged cup.

‘Ah.’ Aaron flashes me a sympathetic smile. ‘Good on you, then. But don’t go about repeating that. Go get in the shower.’ The rest of the boys are crowded around Aaron. Andrew gives me a high five. ‘Great save,’ he says. Miguel squeezes an arm around my shoulders. Even Derek high-fives me.

Pippa is quick to grab a towel. ‘That was quite dense of me,’ she says.

‘It was an accident.’ I smile at her and my teeth clack against each other. The temperature on the ocean drops over ten degrees each night, and, boy, can I feel the chill. On my way downstairs, I turn to apologise to Aaron for jumping in without a life jacket and I meet Hugh’s eyes. He stares at me for a beat too long, unblinking.

A shiver runs down my spine. I head to get cleaned up.

After my second shower of the night, I go upstairs to hang my clothes to dry on the deck. My hair is dripping wet, so I decide to sit on the platform for a while. I curl up underneath the protection of my sweatshirt while the evening breeze dries out my hair. I’m only outside for a couple of minutes before the group of men disbands, everyone heading to bed.