'The Young and the Restless' spoilers for Aug 15 – 19: Victor targets Luca; Adam’s situation goes downhill; Victoria gears up for a mission

It doesn’t get any bigger than this week on the upcoming episodes of “The Young and the Restless” ("Y&R"). On Monday, the walls close in on Adam (Justin Hartley) as he continues to languish in prison for a crime he didn’t commit. Meanwhile, Luca (Miles Gaston Villanueva) tries to pacify a suspicious Summer (Hunter King) , but spoilers hint he should be worrying about Victor’s (Eric Braeden) next moves.

Other “The Young and the Restless” cast members who will appear on the Aug.15 to 19 episodes include Victoria (Amelia Heinle) , Chloe (Elizabeth Hendrickson), Nikki (Melody Thomas Scott), Phyllis (Gina Tognoni), Nick (Joshua Morrow) , Jill (Jess Walton), Billy (Jason Thompson), Kevin (Greg Rikaart), Mariah (Camryn Grimes), Jack (Peter Bergman), Ashley (Eileen Davidson), Cane (Daniel Goddard), Chelsea (Melissa Claire Egan), Dylan (Steve Burton) and Michael (Christian LeBlanc).

Spoiler alert! This update contains more "The Young and the Restless" spoilers. Read on at your own risk if you have not watched the latest episode.

CBS released a preview video for the Aug. 15 episode of “The Young and the Restless.” In the trailer, Victoria tells Nikki, “I just wish that he would have tried to convince me to stay and work with him.” Nikki wonders, “Would you have stayed?” Another scene shows Phyllis as she asks Nick, “You found something to prove that Luca’s behind it?” Nick replies that he found something. “It wasn’t what I was looking for,” he admits. Luca figures in the last scene as he assures Summer that he loves him. “You’re keeping something from me,” she insists.

TV Guide reports that Tuesday’s installment focuses on Phyllis as she continues to stand her ground, while Jill becomes adamant with Billy. Elsewhere, Nick seeks Victoria’s help during a family crisis.

Wednesday’s run centres on Chloe as she comes clean, while Kevin catches Mariah red-handed. Jack, on the other hand, is having a difficult time dealing with Phyllis’ motives.

On Thursday, the episode deals with Ashley as she shares a warm moment with Jack, while Cane and Billy make amends. Meanwhile, Chelsea reels from Dylan’s shocking news.

Wrapping the week on Aug.19, Victoria is on a mission, while Michael finds out something that rocks his world. Elsewhere, Adam finds himself in a dark place.

Click here to watch some episode previews from the official YouTube channel of “Y&R.” Click here to check out some sneak peek photos of what will happen this week in the CBS soap opera. Find out what happens next on “The Young and the Restless,” which airs weekdays in the US on CBS. In Australia, “Y&R” is shown Mondays to Fridays at 12 p.m. on Foxtel’s Arena.