When scientist Luke Ashburton arrives to open the Earl of Bexleys new museum, the last thing he expects to find is the building on fire.

Luke is tasked with overseeing its salvage, but needs the late earls journalsall of which are written in code. Luckily, a brilliant mathematician can help. Unfortunately, she is Grace Chetwood, a beautiful whirlwind Luke encountered at a ball years ago. The night began with attractionand ended with a slap to the face.

Cracking the cipher is a welcome reprieve from Graces messy life in Londonbut means working with Luke, a man she ardently wishes to hurl into the sea. Also stressful? The fact that she cannot stop thinking about him.

Over a week of long days and sleepless nights, Grace and Luke discover an uncommon ability to infuriate one another. But as hotter passions emerge, their connection grows deeper and more complicated than either could ever have imagined.