Roswell, New Mexico

Liz Ortecho returns to her childhood home in Roswell, New Mexico, where she reconnects with Max Evans, a local police officer who was once her high school crush. As their relationship deepens, Liz uncovers the secret that Max, along with his sister Isobel and their friend Michael, are aliens living in hiding. Meanwhile, Master Sgt. Jesse Manes leads a covert government operation, unaware that his son, Alex, is beginning to uncover its existence.

The tenth anniversary of Rosa's death stirs up old tensions as the townspeople direct their anger toward Liz and her father, Auturo, over the events of that day. Max struggles with Michael and Isobel's concerns that his relationship with Liz might reveal their secret, while Master Sergeant Manes makes an unusual move in trying to convince Kyle of the Roswell conspiracy. In the end, Liz and Kyle uncover a startling truth about Rosa's death.

Liz becomes concerned about Max's abilities after discovering disturbing information and conducts tests to better understand his powers. Michael and Isobel respond by taking action to prevent Liz from getting too close to the truth. With Maria's help, Liz searches Roswell for clues about Rosa's final days.

Max struggles with his dual identity when a power outage forces him to help hospital patients, while Liz seeks support from Kyle after uncovering new information about Rosa's death. Isobel and Michael devise a strategy to confront Liz, and Master Sergeant Manes turns to an unexpected ally for assistance.

Max and Michael grow concerned as Isobel experiences unexplained blackouts that lead to erratic behavior. Liz seeks out Grant Green, believing he may have seen something unusual on the night of Rosa's death. Meanwhile, Kyle and Alex discover a hidden truth about Kyle's father.

The episode uses flashbacks to explore key events from 2008, shedding light on Rosa's last day, Isobel's unexplained blackouts, and the early relationship between Alex and Michael.

Liz discovers a shocking truth about Rosa's death and begins taking steps to safeguard herself and others, but her efforts are interrupted when time spent with Mimi, Maria, and Alex reveals another unexpected insight into Rosa's past. Meanwhile, Max confronts Wyatt, and Cameron weighs her decision on whether to assist Sergeant Manes.

Liz and Michael desperately seek a way to save Isobel's life as she faces a critical threat. Meanwhile, Max consults his mother Ann to learn more about an alien symbol's origins. In a surprising twist, Alex takes action against Sergeant Manes.

Max and Michael journey to Texas to consult a faith healer about an alien symbol Max has been studying, while Maria and Liz seek the same healer for a potential cure for Maria's sick mother. At the same time, Alex and Kyle investigate what Sargent Manes might be concealing.

Isobel, unable to recall the events surrounding Rosa's death, seeks assistance from Liz to recover her lost memories. Meanwhile, Max and Cameron look into a string of unusual deaths in the town, and Sheriff Valenti shares a revelation with Kyle about his father.

While the town gets ready for the grand reopening of the UFO Emporium, Liz and her team encounter an unexpected and formidable opponent.

Max, Michael, and Isobel face tension after a significant revelation disrupts their plans. Meanwhile, Alex discovers a hidden aspect of Project Shepard and seeks assistance from Kyle and Michael to investigate further.

Max and Michael disagree on the best course of action regarding the fourth alien. Meanwhile, Liz faces a perilous situation with an unexpected guest, and Kyle begins to unravel after discovering a troubling truth about his father's death. Michael must ultimately confront a tough choice about his own future.