The city of Los Angeles has been occupied by an unknown force. Former FBI agent Will Bowman and his wife Katie are separated from their son during the invasion, and are willing to do anything to be reunited with him. When they are offered a chance to get their son back by collaborating with the occupational government, Will and Katie find themselves faced with the toughest decision of their lives.

Will faces unforeseen challenges on his first day at his new job. Katie receives her first assignment. Maddie reconnects with an old acquaintance. Carlos pays the price for Will's collaboration.

Katie's first mission forces her to question her commitment to the cause; Will's search for Geronimo doesn't sit well with the resistance; and Bram's girlfriend shares a secret with him.

Will continues to earn the respect of his new colleagues, but when his home comes under an attack, everyone is a suspect- even those closest to him. Meanwhile, Maddie finds a way in to the upper echelon.

When the identity of the leader of the Resistance, Geronimo, is revealed, Proxy Snyder sees an opportunity to improve his standing in the Colony, and he comes down with a vengeance. Meanwhile, Katie struggles with the weight of her choices, and her husband questions her loyalty.

A high speed chase traps Will, Katie, and Proxy Snyder. When all is said and done, their allegiances are tested and Will and Katie find out shocking news about their long lost son.

Broussard questions his mentor, while separately Katie feels cut off from her family and her cell. During his hunt for the Resistance, Will comes even closer to the truth. Up in the Green Zone, Maddie finds herself entangled in a seductive relationship. Finally, Snyder keeps his word, giving Will and Katie a glimmer of hope.

An important member of the Resistance shows up. Katie is given a second chance.

Will wants to remove the family from the occupation; Katie and Broussard prepare for an operation; Snyder tries to protect his office; Maddie makes a bold move.

When an important hostage is kidnapped by the Resistance, the Los Angeles block ends up being placed on lockdown.