The events revolve around Lali, who is waiting for her fiancé in a hotel to celebrate their engagement, but he leaves her alone. That same night, Lali meets Onur, who has also been left by his fiancée. Thanks to alcohol and shared grief, they wake up the next day to find themselves already married.
Things get complicated when Lali discovers that Onur is the only son of the owner of the hotel where she works. As they try to separate and work things out, their families enter the picture, leading to more chaos and laughter.
Despite the unexpected circumstances of their marriage, the two begin to feel love for each other, but past problems and misunderstandings continue to put obstacles in their way.
“Room 309” is a blend of romance and comedy and highlights the complexity of family relationships and how love can thrive in the most unusual circumstances.