Four Hands Hits Series-High 7.3% as Song Kang Finds His 'Dead' Rival Conducting

tvN's Four Hands delivered its most-watched episode yet on the 13th, with episode 6 pulling a series-high 7.3% rating on Nielsen Korea's paid-platform national household measure. That's a dramatic climb from the 4.2% recorded just a week earlier in episode 5, and it clears the show's previous best of 5.9% set in episode 2. The episode also ranked first across all channels, including free-to-air broadcasters, in the 9 p.m. timeslot.

The numbers make sense once you see what the episode actually does with its final minutes.

Nine years of searching, one impossible silhouette

At the centre of Four Hands is a mystery that's been running since the series premiere: the sudden disappearance of Choi Jeong-yo (Lee Jun-young) at an international piano competition nine years ago. His closest rival at the time, Kang Bi-o (Song Kang), has spent the intervening years navigating a career defined as much by suspicion as by success. He now sells out every concert hall he plays, but the press can't resist asking about Jeong-yo, and whispers about his involvement in the disappearance have never really gone away.

Bi-o has been quietly running his own parallel investigation with the help of an overseas contact named Vogel (Ko Chang-seok), chasing down every lead he can find. A breakthrough of sorts arrives when a convicted suspect in Jeong-yo's abduction is released from prison. The man confirms he kidnapped Jeong-yo at the Harmonie Competition, claims he planned to release him after receiving payment, but says Jeong-yo resisted so fiercely that he ultimately killed him. He then tries to leverage Bi-o's desperation into a cash transaction, demanding a large sum for more details. Bi-o scrapes the money together and returns, only to find the suspect has been killed in an altercation, taking the thread of truth with him.

With the suspect dead and Jeong-yo's death seemingly confirmed, Bi-o tries to close the chapter and move on. But grief doesn't cooperate. He starts seeing Jeong-yo's apparition in concert halls, including mid-performance from the stage, and his playing suffers badly enough that he enters the worst slump of his career. On the advice of his girlfriend Hong Jae-in (Jang Gyu-ri) and following a doctor's recommendation to properly mourn, he travels alone to the Czech Republic, the site of that fateful competition nine years before.

The conducting reveal that stopped everything

Wandering through Brno, Bi-o stumbles into a conducting competition and freezes at the sound of a familiar melody: Danse Macabre, the same piece he and Jeong-yo once performed together as a four-hands piano duo. Then he notices the conductor on stage. The silhouette feels familiar. When the conductor's face becomes clear, Bi-o realizes he's looking at Choi Jeong-yo, very much alive, baton in hand.

It's a well-constructed reveal, the kind of ending that earns the spike in next-day search traffic. The show has been careful to earn this moment across five episodes of accumulated grief and misdirection, so when Bi-o finally sees his old friend standing not at a piano but behind an orchestra, the shift in instrument carries its own weight. The person Bi-o has been mourning didn't just survive; he rebuilt himself into something entirely different.

The questions Four Hands is now sitting on are significant. What happened to Jeong-yo during those nine years? Why did he abandon the piano for conducting? And why, if he is alive, has he never come back? The show has set up enough goodwill, and clearly enough of an audience, to take its time answering.