The story revolves around a couple, Nicole and Mark, who get engaged in a public park, prompting their heartbroken ex-partners, Connor and Ciara, to plot revenge during the upcoming wedding. As tensions rise, the ceremony becomes chaotic when Connor and Ciara publicly object to the marriage, revealing their own unresolved feelings. Ultimately, the vicar declares Nicole and Mark husband and wife amidst a surprising turn where Connor and Ciara also acknowledge their feelings for each other.