Claudia is traveling to Iceland for her son Patrick's dream wedding. She has a big surprise with her: she is the mysterious "new girl" of his best friend Alex, who even proposed to her and wants to turn the wedding ceremony into a double wedding. However, the secret lovers are waiting for the right time to tell the unsuspecting Patrick. Both fear that he might be unenthusiastic. Shortly after arriving in Reykjavik, Patrick gets a phone call that throws everything upside down for him: his fiancee Anna cancels at the last second. He also gets bad news from the start-up he set up in Hamburg with Alex. Patrick would love to fly back immediately, but a volcanic eruption thwarts his plans. Instead of celebrations and honeymoons, he has to while away the time with Alex, Claudia and his assistant Nina with a tourist program. Nina also has a secret agenda: she wants to seize the opportunity to win Patrick's heart.