Anoop (Tovino Thomas) is an ex-army officer. Manju (Tanvi Ram) is his love interest. Their marriage date is finalised as a result of the untimely floods, they both work as volunteers.
The basic plot of the movie deals with how Kerala faced the floods in 2018. The script has many dramatic emotional elements that hook the audience to their seats.
2018 also gives importance to fishermen who became real-life heroes by saving hundreds of people. They were lauded for their relentless services on several international platforms.
In 2018, Thankachan (Lal) leads the fishermen in his area. Their sincere efforts to save the lives of people who were held inside the houses during the floods remind us of the past.