This is The Guardian.

Hi there. Today we're bringing you something new.

Episode one of a brand new series called Missing in the Amazon,

reported and presented by our Latin America correspondent Tom Phillips.

If you enjoy it, make sure you subscribe to the Missing in the Amazon feed.

There you'll find episode two, as well as all of our award-winning investigative podcast series.

Missing in the Amazon starts right after this.

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This message was paid for by Brittany Ferries. It's a Sunday morning.

It's a Sunday morning in June 2022, the Amazon jungle.

Forests so dense it can be hard to know if it's night or day.

And teeming with wildlife, most of which you can't see, but you can hear.

Macaws, jaguars, howler monkeys, frogs, creatures constantly moving between the trees. On the riverbank, there at a small ramshackle port, two men were waiting.

My name is Orlando Possello.

My name is Christopalvo Negreusz Pisando. People come and Tatako.

Orlando and Tataku talk to me in Portuguese.

Their words are being spoken here by actors.

It was early, but the sun was already rising high,

...