: Ten years prior, the pair had a whirlwind romance that culminated in a Vegas wedding .

The story picks up when Thea returns to London and begins working at the same hospital as Shay. Their reunion is rocky—their first encounter occurs when Thea walks into a storage cupboard and finds Shay in a compromising position with a colleague.

: Shay and Thea are both doctors who met during their residency. Shay is portrayed as a dedicated, high-pressure London doctor and a member of the established Callaghan/Green family universe. Thea is the daughter of a Viscount who chose a life of service over her family’s aristocratic expectations.