He wouldn't know those numbers. Lindsay, what are the numbers? It's the safe. The code to the safe. Otto kept money in it and he didn't trust banks. A lot of use in a house fire. Why did Mason need money? I don't know. I could just see it vanishing. He said Otto told him. What time did you say this video was taken? 12.44pm. No, that can't be right. I've told police everything I did that day so many times. I know exactly where I was. Where were you? I was with Otto. Changing the combination to the safe. 18, 15, 22. That was the new code. The new one. You're sure? Yes. Oh, God. Home from the office at 12.15. Lunch till just after half past where Otto and I agreed to change the safe code. And then we did. Back to the office just after one. I mean, we agreed. Why would he tell him? I don't know. I need to talk to Otto. Linz, we don't know anything right now. Let's not... Your food's getting cold. Pop in the microwave. I'll go get Otto. We can chat in the water. No, I need to... Okay. Back in a bit. You said he wouldn't lie to me. Strange behaviour from Mason the day of the fire. And a mystery about how he got his parents' safe code. I had my scoop. This is Up and Smoke, the strange case of missing teenager Mason Miller. I'm Kay McAllister. It's late after midnight. I'm parked about halfway up the winding track to the old Miller home. I used to love this road, but it felt very eerie since the fire. According to Lindsay, Otto had been spending a lot of time at the ruins of the Miller home. He'd taken it all very hard. I can see my breath. This can't be good for Otto. I'm going to let a lot of tape run in this episode. I want you to experience this night as I did. I turn the last corner and come face to face with the sight of the fire. I'd been here a few times since it happened, but not at night. It's harrowing. My heart is pounding. I'm suddenly worried for Otto's safety being up here by himself. I see him, slumped against the cruel remains of his white picket fence, just like he was that first morning after the fire. My heart breaks. Otto. Ah, hello, Kay. I don't know what to say. I'd come up here with a plan to interview Otto about Mason's strange behaviour without Lindsay around, Try and get him to admit on tape he'd been helping Mason steal money from the Miller safe. Ask him why. But I freeze. He just looks so sad. Alright, bab. My wife sent you to fetch me. And no. I didn't ask permission to record this either. I hug him. Even consider turning off the recorder. Why'd you do this to yourself? Thinking feels like a luxury these days. I stare out at the ruin of the Miller home. It feels so small. I can't imagine how their huge house fit here amongst the trees. Lindsay didn't send me. I just came. You know where to find me. I brought you a hat. Lavender. Just my colour. Bluebells are coming out early this year. Can you see? Better in the daytime. I think it would have been a lovely summer for my peonies. One day when you're old and into gardening, you'll plant some peonies, won't you, won't you? You and your peonies. I'd just kill them. Patience. That's the trick. I wasn't a patient man when I was younger, just like you. I'm a very impatient man. Can I see some of them? Always care. I was showing a video today by some kids. It's Mason acting strange. Strange? From the day of the fire. Repeating some numbers to himself. 18, 15, 22. Is that right? You knew safe code, right? Lindsay doesn't think Mason should have known it. You told her already, did you? Only about the numbers. There's a video of this. Yeah. From almost the exact time you changed the combination. Around lunch? 12.44. Who showed you? Some kids. Mason's school friends. Friends? Otto, how could Mason have known those numbers at the same time you were changing the combination? Did you text Mason the new safe code? Did I text? Yeah. Oh, yes. You won't tell my wife, will you? Well, there's not much other explanation, then. I texted him the safe code, yes. What's wrong with that? Lindsay thought he was stealing money. I was letting him take some, yes. What for? Teenager stuff. I don't know every thought that boy had. She said it was thousands, Otto. Not thousands. He deserves a comfortable life. She's worried. She's been telling you all this, has she? Why change the code? It's your money. Just go along with Linz. Make her happy. I just wonder if Mason was OK. Are you going to report on this? Well, at some point I'll have to tell the police and there's a public interest. Please, please, rather you didn't. It won't fix anything. It was Lawrence, Kay. Lawrence, we know that. The police have said. I'm... I'm so sorry, Otto. I just... I need to find out where that money was going. I think I'll go home now. I have to call. I will. Otto Miller was a gentle man. The sort of person who went out of his way to de-escalate tension. To bring fun. That was about as close to angry as I'd ever heard him be. But that was a weird reaction. The evasiveness, the strange secrecy around letting Mason have some pocket money. I felt it. I'm sure you did, listening to that. He panicked, right? I went back to my car, my trousers and pants soggy from the charred earth. It doesn't take me long to catch up with Otto on the track. I slow down, but he weighs me onwards.