It is revealed that the baby absorbed the radiation from Grace's body, which saved Grace but ultimately led to the child’s death. This leaves Grace and Morgan to mourn the loss of the future they had just begun to envision.
As Grace explores this "perfect" world, she begins to hear Morgan’s voice from the real world, where she is unconscious following an explosion. She realizes she must wake up to deliver her baby, believing that the daughter she met in the dream is the key to bringing this peaceful future to life. [S6E12] In Dreams
Grace wakes up with amnesia in a colorful, flourishing world 16 years into the future. In this reality, the apocalypse has been largely tamed, and she meets Athena , a 16-year-old warrior who is the daughter of Grace and Morgan. It is revealed that the baby absorbed the
Grace believes that by waking up and giving birth, she will eventually die but ensure Athena's survival and the bright future she saw. She realizes she must wake up to deliver
Grace’s background at the power plant looms over the episode. She hopes the dream signifies that she absorbed the radiation, sparing her child, but her initial fears about the baby's health remain a central tension. The Ending and Aftermath