When 19-year old Theodora Quirke heads to work on Christmas Eve the last person she expects to find outside of her flat is St Nicholas of Myra - the Saint people think is Santa Claus (much to Saint Nick's disgust). Given he is in full Santa suit and professing to be nearly 2000 years old Theo is wary, but St Nick insists he is here to save her - although he isn't sure how or why.
St Nick does know that Theo is grieving however, so he shows her four scenes from her life that give her hope, but he's also had cryptic messages from the Christmas Higher Powers that lead him to begin Theo's training as the first ever female Christmas Angel - a role Theo is not sure she is cut out for.
The training is soon derailed by St Nick's evil brother Krampus, filled with jealousy and spite over his brother's popularity and, with confidence dented, and saddened by society's spiraling levels of expectation and greed, St Nick begins to falter.
Theo does everything she can to defeat Krampus and to lift St Nick's spirits but as the deadline for Christmas miracles draws close, she realises she must complete them herself - but is she up to the job?
A Christmas Carol meets Stranger Things in this funny, sweary and moving festive story