Three lifelong pals embark on a chaotic quest to solve the mystery of their old friend's suspicious death and keep their own dark secret under wraps.

The series follows a group of kids at an adventure camp who discover a strange artefact, while also drawn to the fate of four children who mysteriously disappeared twenty years ago.

Archaeologist Fiona travels to Ireland to uncover a long-dead tomb. A threat is released and she will have to fight to keep her teenage daughter from falling under the control of The Morrigan, a vengeful Pagan War Goddess.

Outside the supermarket with her young son, Cathy encounters Michael - the man convicted of the brutal murder of her brother, 20 years earlier. Ignoring the advice of her best friend, Cathy takes to social media, uncovering the successful career and family life Michael has forged for himself since early release from prison, while she grieved for her brother.

Young Tom and his misfit friends fight to save 'Buster' the baby elephant during the German air raid bombings of Belfast in 1941.