What happens when the groom's ex crashes his wedding and proposes to him? Will Shiva marry the girl of his dreams or the girl he is bound to wed?

The story follows the wedding of Shiva and Vidya, but takes a twist when Shiva's colleague Anu proposes to him. Shiva is thrown into confusion, unable to choose between his soulmate and the girl he is slated to marry. As Shiva's world whirls in confusion, other love stories are silently brewing. Dilip, Shiva's friend, meets Dhanya and feels attracted to her despite their differences. Manjunath, the wedding photographer, seeks a one night stand. Two teenagers, Rahul and Preethi, reconnect at the wedding and David, an older man, runs into his old college mate Padma. "ShubhaMangala," explores the various relationships and emotions that arise within the short time span of a wedding day.—Santhosh Gopal