When the six teenagers Alex, Nico, Karolina, Gert, Chase, and Molly find out that their parents are hiding a dark secret, they team up to stop their evil plans and discover their own powers.
As the parents of the Runaways are preparing to sacrifice Destiny in a ritual, a malfunction causes the operation to fail.
Struggling to grapple with what they have witnessed the night before, the Runaways continue to look for Destiny, while Chase and Gert find a shocking discovery at the Yorkes' house.
As the Pride is looking for a new target for the ritual, the kids are trying to piece together the secrets around them to find out the truth.
When Alex is kidnapped, the kids work together to find him, as they get to experiment their newfound powers. As the Pride succeeds with their sacrifice, a mysterious man from Geoffrey's past is revived.
As the Pride hosts their annual gala, the kids try to gather evidence to incriminate them, while many personal secrets are revealed.
In the aftermath of the gala, the parents and kids are joined together at Atlas' Open House. Gert's parents want to send Molly away after knowing about the Pride's activities.
Following Victor's death, the Pride argues on how to revive him. Molly's relative gives her a new lead. Amy attempts to escape.
Molly shows the group the video tape she found. The kids face off against the Pride, as both sides finally confront each other.
The kids race to rescue Karolina after Jonah kidnaps her. As Jonah is planning his next move, the kids are forced to escape.