Hoping to find a way to stop Arthur, Hiro and Claire band together and travel back in time 16 years to when Kaito gave baby Claire to H.R.G.. Meanwhile, Peter and the Haitian team up to finish off Arthur Petrelli for good but are interrupted by Sylar. Elsewhere, in the lab, Suresh has a major breakthrough with the formula that will likely change everything.

Months after explosions brought down Pinehurst and Primatech, our Heroes try to put the past behind them and begin new lives. Now powerless, Hiro tries to train a reluctant Ando to be a true superhero. Suresh returns to life as a taxi driver, Peter is back to saving lives, and Daphne and Matt try to live as a normal couple. Claire's attempt to live a regular life is cut short when she uncovers a deadly plot orchestrated by Nathan to track down and capture those with abilities. Meanwhile, Sylar begins the search for his real parents.