Tensions run high during the first group date as some Undercover Lovers find it harder to keep their secret. Meanwhile, uncertainty grows in the partner villa when partners answer questions from the singles. When confronting footage from the wild first night is revealed, the experiment threatens to spiral out of control.

Tension rises in the villa as doubts and suspicions grow. While some singles do everything to prove themselves, partners get the chance to write a personal letter to their loved one in the singles villa. During a steamy date, boundaries are tested once again.