Borderline comatose by this point, Leo springs to life just before Duck throws him into the water. He places his arms around Duck, squeezes, and plunges the pair into the water. As hinted at throughout Mute, Leo can hold his breath for an extended period of time. Duck drowns, while Leo visualizes his younger self, and then Naadirah, floating.
Leo surfaces to see Josie — who Duck left in the car — hanging over the edge. He finds his voice for the first time, telling her to get back, and when he returns to the bridge, the pair have a brief conversation, clearly having bonded. Leo promises to take her to her grandmother, whom he visited earlier.
The final scene shows Leo and Josie in a cafe. Leo notices Josie wearing a bracelet, made of the wooden charms he'd crafted for Naadirah. He taps a new charm on the table, rolls it towards her, and Josie compares it to those on her wrist. Leo smiles, and the credits roll.
Significantly, by Mute's conclusion, it's clear that Naadirah planned on living a new life with Leo and Josie. Though Leo never visited her home and was withheld from Naadirah's big secret, she'd told her mother of her love for him, and presumably spoken to Josie about Leo, too. There's hope the pair will continue their bond, extending Naadirah's legacy, while able to communicate in a novel way — speech.
