In "I" Vikram, playing the role of protagonist, appears in three different looks, that as a bodybuilder, as a model and as a hunchback. He also appears in a special and surprising look as a beast in an important sequence. Lingesan is a bodybuilder whose dream & aim is to win the Mr. India title. Lee is a top model in the country endorsing different brands.
And the ugly looking hunchback is the spine of the movie. He's both terrifying and sympathetic. There is always an air of suspense around him. Amy Jackson plays the character of Diya who's a super model in the country. Situations bring her and the protagonist together, and circumstances make them fall in love.
Diya's relationship with the lead character leads to many dramatic happenings which have been grippingly told in the movie. Unfolding the mystery of the characters and unveiling their true intentions, narrated in an engaging non linear screenplay, is what makes "I" a riveting and one of the best romantic thrillers ever.