Weeks after Superman's blowout defeat of Ally Allston, Clark and Lois are now working at the Smallville Gazette together and enjoying small town life. But the Kents' romantic bliss only shines a light on how isolating "the secret" can be, as Chrissy struggles to balance a new love interest and her friendship with Lois. However, Lois' own work-life balance is put to the test when an undercover assignment reveals a deadly foe that promises to change the Kent family forever. Superman would move heaven and earth for his family, but with a villain this merciless, even that might not be enough. Meanwhile, the Kent boys find themselves being pulled in opposite directions. Amid all this upheaval, John Henry is haunted by his doppelgänger's past, leading to dangerous consequences for him and Natalie. Lana Lang and Kyle redefine their family post-separation, while Sarah explores what the future holds for her and Jordan now that she knows the truth about his powers. Having learned the hard way that no one else can be trusted to work with Superman, General Samuel Lane reclaims his post at the Department of Defense, only to face his own conflict in working with his grandson, Jordan.

Lois and Chrissy pursue a new lead in the Mannheim investigation against Clark's wishes. Meanwhile, Jonathan, Jordan, and Nat's attempt at a kind gesture is complicated by an unexpected obstacle. Lastly, Lana, Sarah, and Kyle adjust to their own new normal.