On a remote Irish island, a glamorous wedding gathers various individuals, each harboring their own secrets and resentments. As the celebrations commence, tensions rise, unveiling jealousies and stirring past grudges. Then, as a storm brews, disaster strikes: a body is found, turning the nuptial festivities into a crime scene. With everyone trapped on the island, the race is on to uncover the murderer amongst them before the murderer strikes again. 'The Guest List' weaves a tangled web of deception, where every individual is both a suspect and potential victim in this thrilling homage to classic whodunit mysteries.