Roswell, New Mexico

A decade after the death of her sister, Liz reluctantly returns to her small hometown and reconnects with her teenage crush Max.

On the anniversary of her sister’s death, Liz searches for answers. Meanwhile, Max defends his relationship with Liz against his siblings' criticism.

Suspicious of Max’s involvement in Rosa’s death, Liz taps Maria to find out more about her sister’s last days.

When a local hospital goes dark, Max grapples with using his powers to help. Liz confronts Kyle to learn more about who killed Rosa.

Liz gets caught in a dangerous crossfire when shes coaxes a local documentarian. Isobel suffers a series of mysterious blackouts.

Flashbacks to 2008 uncover a bevy of secrets about Rosa’s last day, the truth about Isobel’s blackouts and the start of Alex and Michael’s relationship.

After spending a day with Mimi, Maria, and Alex, Liz has a devastating revelation. Later, Max asks Liz to help him lead a normal life.

As Isobel's health deteriorates, Liz and Michael search for ways to help. Max turns to his mother for answers about his alien symbol.

In search of a cure for Isobel and Maria's sick mother, Max, Michael, Liz and Maria travel to Texas to meet a faith healer.

Liz helps Isobel regain her memories, which provides an alternative conclusion about Rosa's demise. A mysterious murder streak draws attention.