Hiro attempts to delve into Arthur Petrelli's past to uncover the mystery behind him creating a rival company Pinehearst and his hatred towards Angela. Sylar stricken by guilt tries to stop his murderous ways with HRG and Elle vying for his blood. Meredith's training goes up in smoke with the arrival of her brother.

The eclipse plays havoc with the heroes' powers. Arthur orders Elle and Sylar to bring in Claire. Hiro, Ando, and Matt follow Daphne to her hometown to learn what hold Arthur has on her, and Peter and Nathan travel to the Haitian's hometown to recruit him for the war with Pinehearst.

Following the showdown against Arthur, Nathan and Peter find themselves pitted against one another, and Nathan makes a decision that will have an effect on the entire world. Meanwhile, Sylar holds Claire, H.R.G., Meredith and Angela hostage at Primatech; Ando, Matt and Daphne try to rescue Hiro and find their only hope may lie in Suresh.