An astonishing breakthrough is taking shape on the planet Caprica. The rapidly evolving spheres of human and mechanical engineering have collided, along with the fates of two families. Joined by tragedy in an explosive instant of terror, two rival clans led by powerful patriarchs, Joseph Adama and Daniel Greystone duel in an era of questionable ethics, corporate machinations and unbridled personal ambition as the final war for humanity looms.

Zoe's ties to the prototype she was downloaded in leaves Daniel frustrated as to why the meta-cognitive processor won't function in any other bodies.

Meanwhile, as Sam teaches his nephew William about the shadier facts of life, Amanda begins learning a whole life about her daughter she never knew, leading her to make a startling revelation.

The Graystones deal with the repercussions of Amanda's claims, including doing publicity as a talk show host uses their poor image as a punchline every night.

With hopes that Lacy will pick up her deceased counterpart's plan, Zoe recovers her avatar, as well as that of Tamara whose father desperately wants to see her again.

Meanwhile, Sister Clarice continues in her attempts to get closer to Lacy, as the Caprican government stumbles across a misplaced piece of their investigation.

Daniel preps himself to go on the popular Backtalk with Baxter Sarno to put a good spin on his daughter's role in the bombing tragedy, despite protests from Amanda who is unaware that Sam is waiting for his moment to carry out his brother's requested hit.

Meanwhile, the GDD begin raids and searches for evidence linked to the Soldiers of the One, as Lacy tries to get Keon to help her make Zoe's delivery to Gemenon.

Tamara seeks help in the V-Club to return to the real world, but only on the condition that she use her inability to derez to help play an intricate and dangerous game. In the real world, Joseph finds out that he has lost control of young William and that the only way to return as a father he must finally put his wife and daughter to rest.

Daniel learns that Graystone Industries is ready to drop him over his decision to forfeit profits on the holoband. In order to keep a stronghold on his company, he introduces a promising technological breakthrough: the Cylon.

Keon takes Lacy to meet Barnabas Greeley, leader of the Soldiers of the One. Troubled over the work he's been doing with the STO, Clarice hopes to gain attention by presenting the Zoe avatar and sets course by taking it directly from Daniel's lab.

Amanda's life spirals out of control as she begins to see visions of her brother, who died years earlier. As a result, Clarice sees an opportunity to gain her trust and we learn a dark secret from Amanda's past that could have major implications for her life with Daniel.

Daniel is beginning to suspect that Zoe-Avatar is in the robot, but his pleas for his daughter to reveal herself go ignored. In an effort to flush her out, he launches a campaign of psychological torture, resulting in escalating tests that force Zoe into a choice she cannot take back.

When Daniel finally sets a deadline for resetting the U-87 Cylon - and unknowingly ending Zoe-A's existence as she knows it - she makes a desperate attempt to save herself. But when her plan backfires, she finds herself out of time and out of options.

Having lost both his wife and company, Daniel approaches the Ha'la'tha with a deal to capitalise on virtual avatars as a means of defeating grief.

Clarice pitches her plan for apotheosis to the doubtful leadership on Gemenon.

A botched spaceport bombing leads Clarice to discover that her young converts have turned and uses it as an opportunity to dismantle Barnabas's cell.

Agent Duram's investigations steers closer to Clarice and sows the seeds of doubt Amanda has in her.

In New Cap City, a vengeful Tamara confronts fellow "deadwalker" Zoe.
Clarice and Amanda depart from the cabin, Amanda to an empty home and Clarice to a kidnapped Lacy.
Meanwhile, Daniel has successfully won back his company, but there's one more part of the process that Daniel isn't ready for.

Having resumed leadership of Graystone Industries with the partnership of the Ha'la'tha, Daniel aims to hold up his end by trying to recreate the avatar programme as he attempts to perfect a digital copy of his wife.
Sam's personal feelings over political turmoil on Tauron leaves him at odds with the Guatrau and even his own husband.

Amanda tries to get more information from Clarice, but can't get close enough. In order to provide her with the equipment to do so, Duram would have to give her up as his CI, a dangerous confession given the possible leak within the department.

As the Adama brothers rise to new positions in the Ha'la'tha, they are haunted by the mission of their late parents and the different direction the Guatrau is taking them. Daniel hopes to use this with Sam by offering Cylons for Tauron, in exchange for refraining to carry out the ordered hit.

As the "Avenging Angels" change code inside New Cap City, Daniel is able to track them down, but an early snafu in trying to reach out to Zoe leave the Graystones to enter the game only under its strict rules. With only one chance, Daniel asks help from Sam who has no interest in disturbing his brother's peace of mind.

The Graystones' search for Zoe leave them oblivious to the danger of Clarice and her two husbands invading their home. At the same time, the Adamas are targeted by the Ha'la'tha. One family will finally begin the move forward, while the other will experience yet another tragedy.

Clarice and Olaf move forward with the plan to blow up Atlas Arena when they learn of their powerful ally in the GDD. Singh covers their tracks by framing the Graystones as terrorists, forcing them to go on the run.

The grieving Adamas confront the Guatrau for his string of recent decisions in the hopes of avoiding further violence.