On an offshore oil rig, "Iron Island" showcases the duality of people who have their lives torn apart: wherever they are, they feel incomplete. In this scenario, Dante, the oil rig's production coordinator, is an irascible man who sees his life collapsing between the turmoil in the high seas and family dilemmas on solid ground.
A psychiatrist visits PLT-137 to handle an emergency caused by Dante's irresponsible management style. At home, he finds himself alone in the task of caring for Maria.
In prison, Bruno is granted a semi-open regime due to good behavior. Julia meets Ramiro. Dante asks Olívia for help looking after Maria.
Some leave, others arrive. While Olívia returns to PLT-137, back on land, Ramiro’s best friend is critically injured during an operation and his life hangs in the balance.
To exact revenge on Dante, Diogo seizes upon a poorly phrased remark in the evaluation conducted by psychiatrist Olívia to try to harm him.
Playboy and his accomplices won't rest until they find out the whereabouts of the millions from the oil heist Bruno orchestrated. In doing so, they put Maria and Olívia at risk.
Ramiro joins Dante in the rescue of Maria and Olívia and reveals something about his past. Julia uncovers a scheme designed to harm Dante.
Dante has delusions involving Buddha. On the platform, Diogo and Júlia argue. Ramiro and Playboy reunite and settle old scores.
Dante's perilous situation puts Ramiro and Júlia's relationship to the test. Suelen goes into labor right on the platform. Dante finds Olívia's behavior odd.
Diogo convinces Olívia to take revenge on Dante and arranges an investor visit to the PLT-137. While on a mission, Ramiro ends up at the Iron Island. Back on land, Júlia and Olívia face off.
Olívia and Dante settle the score. Out at sea, the platform goes on alert. Ramiro leads an operation on the PLT-137. On land, Júlia tries to stop Olívia from taking an extreme measure.
