This is a love story with multiple layers that get explored in detail threaded together with elements of mystery. 
Ellie is trapped in a loveless relationship and longing for change, passion, and to be seen. When she has a chance meeting with a kind stranger on a train it shifts her perspective.
Meanwhile Rich can't help but feel drawn to the damsel in distress he helped on the train, but they may never cross paths again. 
Ellie is also battling conflicted feelings about her identity, she's always known she was adopted, but is now the right time to find out about her birth family, weighing up the guilt, fears, and excitement to learn more. 
It's a journey of self discovery and resilience as Ellie tackles physical and emotional changes in her life. It explores relationships, loss, themes of belonging, and embracing new connections. 
There is a good amount of will they won't they tension, mutual pining, and the unpredictability of love.
This is a very emotional read with relatable themes, navigating vulnerabilities in life, and a journey of healing.