The truth will come out in the upcoming episode of "Reign" season 2.

In the previous episode, Catherine (Megan Follows) discovered the reason behind all her hallucinations, which is the poison placed on Henry's (Alan van Sprang) bible pages that she has been reading a lot lately. 

But in the coming episode, the royals might soon find out why the bible was spiked with poison. Was it really intended for Henry before he died? And will they find out the real reason behind it? 

The official synopsis for "Reign" season 2 episode 14 titled "The End of Mourning" reads: 

"As Mary (Adelaide Kane) and Francis (Toby Regbo) investigate who was behind the poisoning of King Henry, they unearth secrets of the past which force Mary to confront her feelings for Condé (Sean Teale) as she attempts to move forward. Catherine finds herself in the middle of a romantic triangle when the Duke of Guise (Gil Darnell) returns, which forces Narcisse (Craig Parker) to commit a hideous act out of desperation. Meanwhile, Greer (Celina Sinden) finds herself in a situation she never fathomed in order to survive." 

It means that the upcoming episode will deal with Mary's real feelings for Condé despite the fact that she is planning to push it past behind her and pave the way for him and Lola (Anna Popplewell) to have a relationship. 

Meanwhile, still promo images for the upcoming episode show King Antoine (Ben Aldridge) talking to Condé after he recognizes Bash, who he believes to be the killer of their brother. Will Antoine avenge their brother's death? 

On the other hand, the promo trailer for the episode portrays Condé as a guilty man for a past crime. Will Francis order his execution if they find out that he did something wrong? 

"Reign" season 2 episode 14 will air on Thursday, Feb. 12, on The CW.