The forthcoming installment of "Once Upon A Time" will be a busy one. In episode 17 of season 4 titled "Best Laid Plans," Gold's evil schemes continue to unfold. Even Emma is not safe from Rumplestiltskin's evil plans, and Hook is doing his best to warn her to steer clear of the trouble. The man, who was banished from Storybrooke, is determined to get revenge and he would not show mercy to those who get in his way. 

Meanwhile, the Evil Queen has a way of messing up with the dangerous divas. In the forthcoming episode, Regina sends the trio on a wild goose chase, but it remains to be seen whether or not her plan will go the way she expects it to go. 

On the other hand, the quest to find the Author of the book is still moving forward, and the next installment promises a breakthrough in Operation Mongoose, thanks to Henry. However, with an important detail they mined, Mary Margaret and David find it best to recoil and think of the best course of action in dealing with it. So it looks like fans are close to uncovering the identity of the person behind everything.

Episode 17 also takes viewers to another Fairy Tale Land flashback. This time, it involves Snow and Charming and their journey to secure a future for their child whom they wish to be a hero someday. With the couple's great desire to fulfill that noble destiny, they are led by a travelling peddler to an old hermit, who can very well make that future happen. However, the trade will not be an easy deal. In exchange for the goodness of the child is something that "will haunt them for years to come."

"Once Upon A Time" season 4 episode 17 "Best Laid Plans" will air on March 29.