The trailer of Alone, featuring Mohanlal dropped ahead of New Years. The video focuses on a man named Kalidas who has to investigate a rather suspicious flat in the middle of the COVID-induced lockdown, only to find that it might just have supernatural presences looming around. In the brief trailer, Mohanlal plays Kalidas, who waxes eloquent about the 'Butterfly effect' before he decides to visit a rather spooky flat as he tries to get to the bottom of the mystery. However, it isn't all as straightforward as it seems as Kalidas has several tricks up his sleeve. It seems like a one-hero film with only Mohanlal at the center of the mystery; he might just be the root of all the problems too. Alone is directed by Shaji Kailas. Alone marks the reunion of Mohanlal and Shaji after a gap of 12 years. The actor-director duo had earlier delivered hits like Aaram Thamburan and Narasimham. Their last collaboration was Red Chillies, which came out in 2009. The tone, feel and texture of Alone, however, is a unique Mohanlal film and doesn't possess over-the-top masala that people have come to expect from this collaboration. While unveiling the title of the film, Mohanlal had earlier spoken about his collaborations with director Shaji Kailas. “Shaji and I have worked in several movies. Shaji’s heroes are always brave and strong. And real heroes are always alone. You will understand it when you watch this film,” he said.