With Michael Phelps it can all seem so simple, so pre-ordained. A swimmer defined by victory, a man who has always come through.

Except there has been nothing straightforward about the 'Fifth Act of Michael Phelps'. His 200m butterfly triumph in Rio's Aquatic Centre deep into Tuesday night may even have been miraculous. For this is a hero who had lost all sense of himself, an obsessive who had long ago begun to hate the gift that defined him.

The first three acts offered little to indicate the fall that would follow.

The 2000 Olympics, as The Kid - 15 years old yet finishing fifth in the 200m butterfly final, the boy with ADHD who had found his perfect focus, a world record holder before his 16th birthday.

Act Two, as The Freak - a 10,000-calories-a-day diet, a wingspan of 2.08 metres, hypermobile ankles, lungs twice the size of the average adult male. At those Athens Olympics he would lose the 'Race of the Century' to Australian rival Ian Thorpe but win six other golds, a body designed for water, a boy in love with the pool.

The 2008 Olympics, and Act Three as The Superstar: eight gold medals, no records left standing, the world at his size 14 feet.

And then, around the supposed happy ending of London 2012, Act Four: The Cynic.

It had begun in 2009, when a photograph emerged of America's clean-cut hero apparently smoking cannabis. It continued through a three-month suspension, through missed training sessions, through a loss of the focus that had once seen him so fanatical he would count each stroke in every final, just in case his goggles ever filled with water and left him unable to judge the distance to the wall.

"I didn't care," he said later. "I wanted nothing to do with the water. Nothing."

Phelps still won six medals in London, four of them gold. But he was beaten in the 200m butterfly by Chad le Clos, the childhood fan turned adult assassin, and trailed home fourth in the 400m individual medley.

Retirement should have brought relief. It brought late nights and new friends, and another fresh start with long-term partner Nicole, but it brought no peace, and nothing to replace the one thing that had dominated every day of his life since the age of seven.

And so, like Thorpe before him, he began a comeback. And like Thorpe before him, he found the old magic hard to reignite.

At the US Championships in the summer of 2014 he failed to win a single final. Then, driving home from a night out that September, he was stopped by police for doing 84mph in a 45mph area. A drink-driving conviction followed, accompanied by a six-month suspension from US swimming.

Rio? Rio couldn't have seemed further away.

"He had no idea what to do with the rest of his life," his long-time coach Bill Bowman told the New York Times.

"One day I said: 'Michael, you have all the money that anybody your age could ever want or need; you have a profound influence in the world; you have free time - and you're the most miserable person I know.'"

And so began the Fifth Act.

It started with six weeks in rehab at a treatment centre in Arizona called the Meadows. Phelps, one of the most famous sportsmen in the country, accustomed to the privileges and protection that come to that elite, was just another patient - going through the same group therapy, staying in the same spartan rooms, forced to confront a past that had become a burden rather than blessing.

Like Thorpe, Australia's most decorated Olympian, who had won three golds at his home Sydney Games and two more in Athens, Phelps had discovered that medals did not bring happiness. Neither did swimming, the one thing he could do, the thing he did better than any other man in Olympic history.

It was something that appeared to afflict so many of those who, in the words of Australia's 1996 Olympic 1500m freestyle champion, Kieren Perkins, "spend six hours a day with heads in a bucket of water, looking at a black line."

Thorpe eventually admitted his own life-long struggles with depression, to his problems with alcohol and his adult thoughts of self-harm. Then there was his compatriot Grant Hackett, fifth in that Race of the Century, the third of them to end up in rehab, the third to lose himself in a stalled comeback.

At the Meadows there was a small pool. Because water had always been Phelps' sanctuary, he was instinctively drawn to it. But wasn't swimming the problem? Didn't that gaping hole in his life need filling with something else?

"The problem for me was I just didn't have enough balance in my life," said Leisel Jones, who won nine Olympic medals for Australia before herself succumbing to depression in young retirement. "I didn't have anything else, and that was terrifying for me."

(BBC)