Arman and Yonca must swim out to fix a rupture, but the submarine is still in jeopardy. The Yakamoz crew discovers an intruder.

After Hatice reveals a shocking truth about Erenay, Umut and Yonce begin to suspect Defne. The crew tracks an airplane. Cem makes a devastating choice.

Umut decides to switch course and head for a seed vault in Norway. Hatice snoops inside Defne's room. The crew docks in Spain, and carnage ensues.

Umut reads a message from NATO that leads him to lash out against Arman. Arman sets a trap for Umut and speaks to his father on the phone.