When MIT grad student Liam Cole (Charlie Rowe) discovers an asteroid is set to collide with Earth in 186 days, he joins forces with tech billionaire Darius Tanz (Santiago Cabrera) and the U.S. government to try and stop it - and together they stumble onto the greatest conspiracy never told.

Darius and Liam work to invent a theoretically impossible piece of technology to divert the asteroid, and Grace risks everything to help Darius.

It's a race against time as Darius must accelerate his plan to stop the asteroid before the Pentagon shuts him down.

In order to prove to Harris and Grace that he's not a traitor, Darius must reveal one of his most closely guarded secrets.

Darius recruits Grace, Harris and Liam for a dangerous mission, and Jillian confronts Liam about his secret.

Grace and Darius slip off to Russia behind Harris’ back in an attempt to stop a potential nuclear conflict. Also, Liam seeks solace with Amanda.

Framed for murder, Darius and Grace must try to escape from Russia, and Liam tries to convince Jillian to come back to Tanz.

Grace narrowly escapes a deadly assassin and Darius and Liam forge unlikely alliances.

Grace and Darius seek answers from the President and Harris discovers deadly secrets.

Grace and Harris must forge an alliance when their children's lives are in jeopardy.

Darius, Grace and Harris join forces to prove the president was murdered. Also, Grace tells Zoe the truth.

Harris, Grace and Darius must topple the illegitimate government, and Darius makes final plans for the ark.