In this first episode are two couples in their 20s, who both met as carefree students with their lives ahead of them, when their worlds were turned upside down.Nick and Sophie, from Cambridgeshire, were in the middle of searching for a home together when Nick was diagnosed with a rare form of cancer. Thankfully Nick survived, but was left without his sight. Nevertheless, in light of their experience and remaining by his side every step of the way, Sophie accepted Nick's marriage proposal.The second couple, Carly and Nelly, from Newquay, were also searching for their first home together when, in a freak accident, Carly fell backwards off a wall and was left paralysed from the neck down.However, not letting the challenge that lay ahead beat them, rugby player Nelly proposed to girlfriend Carly and the couple did all they could in preparation for the wedding day she had always dreamed of.