Astronaut Lee Rifkin's life is about to change. NASA has done the math. The space object named Cassandra 22007 is not behaving as expected. He will lead a team on a cutting-edge ship to get a closer look. But another group wants to get there first. Who is this shadow organization that seems to be one step ahead of them? Agent Jenna Haynes works to put together the pieces that will pull the veil off those who seem to have known about Cassandra's arrival since long before NASA spotted it. What is their goal?

Oliver Matthews starts to believe he is living in a simulation. When he awakens in a pristine, futuristic facility, he learns from Holly, the facility's AI, that he’s been preserved for over a thousand years, living in a simulation, and that the world he once knew is long gone. But as Holly guides him through the new reality, the details don’t quite add up. As he delves deeper, Oliver begins to question what’s real, what’s simulated, and who he can trust.

As World War III rages, the scientists in Antarctica are thankful for the isolation—until a group of Chinese scientists arrive at the American research base. In their truck is a dead body, the first murder in Antarctica. The potential for a geopolitical firestorm is great, and, with no clear jurisdiction, the Americans don’t know what to do. But they soon realize the Chinese scientists have brought far more with them than the body…

Sam Levine knows what it means to struggle. After several missed opportunities, he's been forced to turn his talents to freelance work, picking up whatever dirty job he can find only to make ends meet. But there's an end in sight. An opportunity to change everything. And when a dangerous, high-profile job comes his way, he sees light at the end of the tunnel. Hope has been in rare supply, but even with the dangers inherent in his decision, he puts his life on the line for a chance to elevate his situation.

Scientist Beth Darlow has discovered the unimaginable. She's built a machine that allows human consciousness to travel through time—to any point in the traveler's lifetime—and relive moments of their life. An impossible breakthrough, but it's not perfect: the traveler has no way to interact with the past. They can only observe. After Beth's husband, the co-creator of the machine, dies in a tragic car accident, Beth is left to raise daughter—and continue the work they started. Mired in grief and threatened by her CEO, Beth pushes herself to the limit to prove the value of her technology.