Davina McCall rings the bell on a one-of-a-kind speed-dating event where single hopefuls get to date a stranger they could end up marrying. The only catch? They won't know who they've been matched with until they meet them again on their wedding day... on the other side of the world. The first three couples start their stranded lives together, but for one pair, it's not long before a blast from the past threatens to sink their ship.

A mysterious crate sweeps ashore to help the honeymooners get better acquainted. Tensions spill over at the first Couples' Cove, before Davina delivers a dilemma that could change one pair's fate forever.