Rangers of Shadow Deep Core Book - Deluxe Edition - Rules of Play says:

Rangers of Shadow Deep is a solo and co-operative tabletop miniatures game, in which players create their ranger, gather companions, and play through a series of missions in their fight to hold back the darkness. If their rangers survive, they will grow in power and ability, and be sent on more difficult, dangerous and intricate assignments.

This Deluxe edition also includes the first supplement for the game, Burning Light. The Rangers’ must venture to a ruined convent, searching for an ancient artefact. As they choose what order to explore the ruins, they must gather clues to the artefact’s location. But they must be quick, for the longer they remain, the more the forces of the Shadow Deep become aware of their presence.