Milo Sturgis and Alex Delaware make for a brilliant detective team and their bravery highly resembles the traits of a Leo. Finding themselves seemingly crashing a wedding reception, they encounter a gruesome murder and a mysterious victim that none of the partygoers recognise. With theories about why the murder was committed and who the woman is, Sturgis and Delaware are pressed to figure out what really happened in The Wedding Guest. But with 100 guests to question, they'll find that this crime will not be an easy one to solve and they'll have to use their collective minds and strengths to bring the killer to justice.